If it is fully insulated then you are in business, if not, you'll have a lot more work getting the walls and attic in condition to have a room. #3 I don't see any issue there.

Two townhomes sharing a wall in the middle.

I mean what else are they saying for that $7k, "break-through" revelations of genius like pick 1,2,3 wall colors for your units and paint em all with that keeping the paint codes so refresh paint can be done via touchup.....

BTW Denver requires a permit for pretty much anything from 1/2 a sheet of dry wall and with the new lead regulations you should pretty much assume that ANY work will require a permit and plan accordingly.

we were only 10 days over schedule (we allocated just under 2 months) which is remarkable considering the various issues we encountered and the size of this rehab (we removed 4 walls (including a load baring), added 1 wall, added new bathroom, redid kitchen and existing bathroom layout, (new locations on shower, toilet, and vanity) removed a door, added 2 windows, new flooring throughout, and added an eyebrow porch.  

Its not just a matter of rearranging dividing walls plumbing and electrical.  

Quote from @Jaron Walling: Short answer; don't buy OOS, find/buy/create opportunities in your backyard.Long answer; you need facetime with these professionals and they need to value your time (take you serious).

Quote from @Jaron Walling: @Samuel Olivas From personal experience you can't have your cake and eat it too. 

First of all, their certification program is NOT accredited by any legal body so it is basically worthless other than it may look good on your wall.

I will rebuild brick walls, replaced beams, plumbing, electrical, etc.