My tax man (CPA) did not assert that I need to include the triplex inside the S Corp... but, when I asked, he said I COULD put it in there if I wanted to.

By withholding retention you are incentivizing the GC to complete the project whilst you earn interest on that cash in the process.You'll also need to include a project milestone schedule detailing when each task is expected to be complete.

This is a very dumbed down version because I am not including a lot of fees and costs that are associated with closings, but you get the idea.

@Ben MiculobUnless you specifically say short close all cash, you would assume the standard time to close, which includes 7-10 inspection and then financing period.

Now, we are definitely going to get a real estate attorney's help, but I wanted to prepare ahead and think of all possible scenarios to be included in the agreement so we can have a productive and comprehensive discussion. 

This includes AirBnB, VRBO, and other similar house sharing/swapping services

Duplexes can be build for around $85-100/ft2, assuming middle grade finishes, this does not include land or soft costs.  3-4 unit building would be a decent amount more on a $/ft2 basis due to the use of different code and the increased fire & safety systems. 

Total loan amount including closing costs was $318,313.

I'd maybe expand "areas with strong demand" to include property types in addition to geographic locations.

It added nearly two months on getting the title business worked out which included getting a non-interested fire inspector out twice, who was worse than "No show Jones," then learning that the home was still tied to a different piece of land within our county.