Whats a fair price I can expect if I do the demo to the studs myself?

During demo we found armies of very much alive and hungry termites and $17K of extra work including replacing three walls of the garage while temporarily supporting the roof which had just been redone. .  

Looking at demo, permits, architect drawings, upgrade the electric panel, framework, roof, windows, extend the chimney (needs to be a certain number of feet above the roof-line), electric, heating (and maybe cooling), plumbing, flooring and walls, doors and trim, bathroom tile, fixtures, paint... 

I would highly recommend asking for a live demo of any software you wish to evaluate.

@Sean Yang An alternative would be to look to raise private lending monies.

@Theresa Harrison believe you can also charge for at least the demo and maybe the install?

We just closed on 22 units mid march and went back and forth on whether to organize the reno work schedule ourselves (schedule the demo guys, painter, buy floor, schedule floor installer, install vanities/fixtures, etc..) or just hire a GC that would oversee the whole shabang.We ended up hiring the GC and the work has been good overall, but we're not as happy with the timeline.. we have a 18 month term bridge loan in place currently and planned on having these initial units done in half the time it has taken the GC.

It is "probably" not structural if it was poured after the walls with no connection to them.If it's just to make a floor, you can demo it and pour a new pad (4" thick).  

Ask for a bid broken down by room in detail ie: demo costs? 

Well into demo phase.