I mean, it doesn't make any difference to them, you're paying the same amount upfront either way.

And, the Home Possible does have a first time buyer requirement where the FHA doesn't so use it first if you can. 

You don't want to spend the little money you have or worse (go into debt) to pay for a guru class that doesn't work. 

It’s awful difficult to beat someone who doesn’t give up.

I have a contractor (who doesn't know ADU law), a PM and cleaning crew lined up (I own other properties in The City, and have done VRBO in other houses, so I know those issues).

Personally I'm not sure that I would ever do it on my own residence, but it doesn't seem like a bad solution for rental properties where every penny is being pinched as @Mark Fries suggested. 

Doesn't have to be anything fancy  and expensive written by an attorney  but just something that outlines the scope of work  estimated start and finish dates  and Cost of work.

(It will cost at least 450$ and it will take almost a month anyway) or wait for the 25th and if he doesn't leave start the process?

It also doesn't include the bump in rents we'll get for 4,5,6 years while those park houses are being owner financed to tenants.My biggest question mark is the little town it's in.

Doesn't matter if its built with 30 year shingles.