Nexusfire

Is there a good reference online (not in game) where I can see the basics of building a base? Not that it costs prestige and that nonsense, but how much each thing costs, what it works with, basically what it does, and where it must be placed?

So I am looking and looking and can't find this answered (I'm sure it is, just can't find it).

1) What are the exact steps one has to take to get the SG where it can run SG missions?

2) Also, how does one "attach" items, when an item says it must be attached to use it?

3) Can one sell back rooms or just delete them?