Licensing fees, CE classes, E&O insurance, general business liability insurance, sentrilock/suprakey fees, board association, etcc.

I commonly hear that permitting is not an issue unless I am touching plumbing or electrical but just to be safe and avoid any future liabilities, I am trying to understand it is even feasible to get the new rooms/garage permitted for their intended use.3.

Some lenders may also want to see law and ordinance coverage in your insurance and perhaps a rebuild letter from the city stating that the property could be rebuilt as a residential 4plex if destroyed. 

I assume it has sewer/septic, water and electric and they 2 tiny homes are plumbed/wired?

@Nathan Frost uhm, not sure you understand Detroit market.Motion lights & cameras may work half the time at best.Too many insurance claims will get you cancelled and eventually black-balled.But, what do we know after 24 years in the Detroit market...

Again PMI offers the lower rate because its less risky and offers insurance to the bank.So when you sell your current home try and keep as much as possible and avoid an "All Cash" offer.

no rent coming in but expenses were low - just utilities and insurance. 

They do everything for you (payments, taxes, insurance coverage) - the website and app are easy and functional and you can vet your guests!

Is your DSCR ratio greater than 1-meaning are you cash flowing (according to the lender's criteria of mortgage, property taxes and insurance (and HOA) if applicable).

If you have more, they will not insure you.