-laminate (preferable AC4 or AC5, maybe also waterproof/waterresistent, at least 10-12 mm with pad included= your downstairs neighbors will love you)-engineered-LVP (Luxury vinyl plank); allure from HomeDepot (lowes/menards/floor and decor equivalents) has a good reputation here, but others ventured in the realms of commercial and it depends on the relations with local rep to get the "good stuff".

Have them pay you the equivalent of two months rent, in exchange for you holding the unit empty until October 1st, at which time they can then enter into a new lease agreement with you.  

I'd also get the security deposit from the seller as part of escrow, if possible.Then, as soon as you close, you post a 3 day notice to pay or quit (or the equivalent for your state), including all back rent and whatever other fees you can legally include on the notice.Then, you can negotiate with them to perhaps let that back money & the eviction go, if they disappear before the 3 days is up, etc.  

Most disability law experts feel that requiring a deposit would be the equivalent of charging an advance damage deposit for someone in a wheelchair.

I would check with whatever your equivalent to our Health Department is.

That might theoretically be equivalent to a Los Angeles 3 Cap property that has an annual 10 percent annual appreciation.Money inevitably flows pretty quickly to good opportunities, flattening out yield curves. 

That would be the equivalent of a 20% increase in Kansas City.   

Once you do the site development work and run the necessary utilities to make them the equivalent to a site built ADU, the overall cost will exceed that of the ADU

:>)If I were in your shoes, I would buy one property, put the equivalent debt from the condo on one of the purchases and pay all cash for the others.  

I'd point out the no smoking policy and tell him to invest in a vaporizer or consume edibles equivalent to his daily dosage.