I was supposed to close on a place in September but still have yet to get the keys. 

I sent him a notice today via email demanding payment no later than 5:00pm 4/16/18 and I threatened to notify the MLS board and the department of state if he doesn't pay me.

Basically, if you want to do the work above board, I would say that there is NO WAY to do a $150/sqft build in the Bay Area.

Private money has been the key to growth for me. 

Then factoring in potential mold and insulation... you know where this is going $$$$.On the upside however, we have updated plumbing, electric (supposedly, without inspection yet), all new windows, and overall a practically turn key house besides the things mentioned above.

The problem is once you own more than 10% of the building conventional lenders have an issue lending in the building so the board and existing shareholders will have a problem selling/refinancing their loans.

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So, not to invalidate your 14 day notice, you should serve it on the 2nd.So the 2 ways is to either go back on the 2nd to give it or pick everyone up on the 2nd and give it then.Be careful of the individual contracts cause this could set you up as a boarding house. 

I think finding a good set of boots on the ground is key.

Make sure you still understand due diligence and what you are buying or pay Someone a fee to get it boarded and reviewed for you.