Be ye warned -- this is a long answer!
I feel your question is essentially a good one (which is why the lock I applied is temporary, and I haven't suggested closing it). A few of the points you raised are not good fits for Server Fault, but you can easily edit your question to make it an excellent and useful question with lasting value.
The problems I see
Your question should probably really be broken up into more than one question (as a general rule, if you need bullet points to list out your question you have more than one question)
Points A & B seem like two parts to one question (they're broadly related in that they're essentially asking "How do I make this system multi-site-aware?").
Point F (
How would you recommend to store backups for these desktops? We do have a SAN and a NAS in our environment and we do have one spare DAS (Dell MD3000).) is really a separate question entirely.
As I mentioned in the comments on the question backup and restoration is a complex issue. We need to know the backup software in question, the size of the backups (the full backup and the incremental changes, and how many of each you need to hang on to), how often you'll need to do restores, etc.
Point E is vague:
how do you or would you recommend to protect these 4 servers (2 x SQL and 2 x MGMT Servers)?
We can assume you're not talking about physical protection (site security), but are you talking about Anti-Virus, Anti-Malware, Firewalls, Backups, Something Else? -- There is enough ambiguity here that I think if you flesh it out with more detail you will have an entirely separate question that you can ask. (It's possible that you'll need the answers to this question before you can deal with the storage question in point F.)
What Hardware would you recommend as a Server spec for the SQL server 16GB RAM, Dual XEON?
This is either a capacity planning question (Can the server I'm talking about handle the load?) or a request for us to recommend a specific server/type of server. Both are problematic in that we can't be intimately familiar enough with your workload to make capacity suggestions, and though we may occasionally recommend specific products/services incidentally in answering a question it is Stack Exchange network policy that questions seeking specific product/service recommendations are off-topic.
Point D (same issues as Point C)
Addressing specific points
Two of SF Operators MdMarra and voretaq7 commented - voretaq7 even gave me a link (http://blog.stackoverflow.com/2010/11/qa-is-hard-lets-go-shopping/) saying that my question's point C is falling into this category and I disagree it does not.
Actually three of us grumbled about points C & D (MDMarra, sysadmin1138, and myself) -- You may not be asking us "Netgear or Linksys?", but it still seems like you're looking for either capacity planning ("Buy a box with 6TB of 15K SAS drives and a terabyte of RAM") or product suggestions ("Buy an IBM x3950") to answer those two points.
Capacity planning is generally considered unanswerable as there is no good universal benchmark (1000 users sitting idle are a lot less resource intensive than 1000 users hammering the DB server with complex queries - only you know your environment/users well enough to make these calls).
Specific vendor recommendations/comparisons/lists are off-topic network wide per the blog post you mentioned. The last time we recommended Acme brand bird seed a coyote sued us for emotional trauma.
I then clarified in the same post via comments and they even deleted my comments and locked the post.
I'm the Big Bad Comment-Deleting Post-Locking Mod. (As is often the case when comments start disappearing).
The comments in question got zapped because they were more appropriate as a Meta discussion here (why a particular question or components of it are on/off topic, why certain comments are allowed to stay while others are deleted).
It's also general (though loosely enforced) policy network-wide that comments about "why was my post downvoted?" are inappropriate as they tend to lead to protracted discussions (arguments) in comments about voting. By extension "I flagged X's comment" leads to the same kind of mess, and will either be scrubbed from the comment or deleted outright.
The lock was applied as a cattle prod to get you to open this meta question. Since it worked the lock is now cleared.
Clarification of a question/answer a result of comments or meta discussions should really take the form of edits to your post rather than comments -- the question should lead naturally to the sort of answers you want. (Incidentally that is one of the reasons I closed your re-post: If a question needs to defend itself or explain what it's seeking as an answer there's probably a better way to ask the question that leads naturally to an answer.)
I flagged MdMarra's comment as off-topic and I felt it should be removed, I flagged it but instead my Question got down-voted ! :-)
I declined that flag, as I felt MDMarra was pretty much spot-on, and do not consider the phrasing of that comment to be inappropriate, rude, or offensive (though it is perhaps a bit curt).
Comments (and flagging) have absolutely nothing to do with downvoting. In fact voting is a completely blind system from our end (even mods can't see who voted on questions).
with all honesty - do you think a person will ask someone on server fault to design their solution
Yes. Absolutely. It happens nearly every day.
People come to Server Fault with a vague concept and expect for us to provide them a full environment specification and pathway to implementation. This is a natural byproduct of Server Fault becoming more popular: users who don't know any better will expect this site to be effectively "free consulting".
I also don't think that's what you're doing -- like I said your question is fundamentally good. It can be improved to be excellent with relatively little work.
Specifically Re: the old question you mentioned, this question is still around because it's old. With attention called to it from this Meta post it will probably be closed soon if it's not gone already.
There are lots of old questions which are off-topic/not constructive based on today's window of topicality, and the scope of Server Fault has evolved substantially since it first launched (particularly over the course of the last year or so, as we are encouraging users to take a more active role in curating the site as a "walled garden" where strong questions that will be useful to a lot of people long-term (like points A, B, F, and possibly E from your question) can thrive, being asked and comprehensively answered).
This involves a certain amount of weed-pulling (knocking down older questions like that one when we find them) and just as much constructive pruning (refining new questions to make them excellent, not just good -- the point of this discussion)
I hope all of that makes sense - I'm happy to go over any points where you have questions either here or in chat.