In reply to grumpybearpantsclimbinggoat: Yes I did one in my garage. Used 2x4 a simple frame. Used simple metal fixtures from band q. Biggest pain was installing all the t-nuts make sure they aren't threaded before fixing them in as it can be a pain if they get stuck when you are putting holds in.
If you can find some of my pics in the gallery I posted some of my wall but they focused on the back wall that hangs of an adjustable chain (think its posted under indoor walls).. I can take some more of the actual frame if it helps.
If you have the cash, this wouldn't be a major job for a joiner.