The biggest issue was getting it out of there. $250.

Quote from @Noah Wright: We specialize in this specific issue, actually. 

This is because DSCR loans do not follow/ pass consumer protection laws. when you live in the property, it creates massive problems for this loan type and the lender which would issue it to you. 

Doing general paint and carpet cleaning for this property along with some minor repairs, junk removal and fixed a couple small plumbing issues (mostly deferred maintenance).

https://www.singlekey.com/en-us/ - I believe they screen the tenant as part of their underwriting before issuing the rent guarantee policy and the tenant also pays the premiums. 

She claims that it's because of the deposit, but when I gave her a link to a gas company that doesn't require deposit, she cussed me out and wrote that I wasn't allowed to tell her which gas company to use.

Of course another possibility that the work done was subpar and the seller has a legit issue with the billing amount.  

If the commercial space isn't too disruptive, you shouldn't have an issue renting an ADU up there.

But unlike your relative she loves her job so maybe that is why she was tagged. 

They won't fix my issue nor respond.