Odds are you will get some of them back at some point and have to resell them.2) You might want to have your attorney review the lease to own contracts to make sure they are SAFE act compliant (unlikely).

No retainer needed - but pay someone to review your docs and make sure you are current and compliant with state law.

Syndicated Mortgages are getting a bad name here in Ontario, however the basic relationship structure is still sound especially for OSC 45-501 compliant investors.  

You'll need to run sprinklers throughout the house (costly for a number of reasons, especially if you have to increase the water main size), have an enclosed trash area with a drain, have electrical exist signs at the egress points in the house, and they will ultimately require you to become ADA compliant.

There are lots of compliant residents.

The only thing is to avoid making any disqualified transactions either direct or indirect to remain compliant. 

They would by a small property for cash (or a fractional ownership in a debt free 1031 compliant product). 

I also can't imagine its compliant with local code.

This deal would be for a total of six duplex (12 doors total) with each unit having 2 beds, 1 bath, 1 "office" in the basement (aka bed with non-compliant egress). 

But you have to make sure you're Dodd Frank compliant.