Only 100k for all your work barely sounds worth it, with all respect. 

Do you have specific numbers to share with the forum, particularly with respect to your in-laws house?

Trust me.Set the Tone Early: Respect is KeyAs an introvert, I hate conflict.

And, they all sign the lease to make them responsible for abiding by the terms of the lease, respecting your property, AND paying the rent.  

Look, this MTR of 30 days+ is completely arbitrary.  30 days stay is much closer in respect to tenant types to STR.  

So you and I agree on a lot of stuff… However, I do want to clarify that I am not against Sub2 if done respectably in the right situation.  

Ultimately, clear communication and expectations handled in a respectful manner can avert any issue.

I doubt any respectable lender will consider a property without electricity and missing breakers as "working" as the property is not habitable in this condition.

However, in private financing it is customary for the borrower to foot those costs.You can find each institution's registered account and arm's-length mortgage guidelines, and fees on their respective websites.

Many investors are willing to share their experiences, especially if you come from a place of curiosity and respect for their time.