It’s so comprehensive that I’m compelled to give you a great answer, but there is so much to unpack that a full proper answer to every question may take longer than I have tonight.

You screen them the same way a hotel does: not at all.The only thing you need to verify is their credit card number.

Properly structuring your bank accounts ensures that every dollar in your business has a purpose.

There are various other items that may come up such as: Proper firewall suppression, adequate entrances/exits for fire safety, stair safety, size of kitchen appliances, etc... for my specific example. 

The obvious answer here is to somehow get some income and start paying down the credit card debt. 

I own 12-doors in Detroit proper.

You can try your luck to see how long it’ll take for the roots to re-grow, but be prepared to eventually make the proper repairs.

This was also confirmed when I went there to submit the required documents, but they couldn't give me a proper timeline on when it would happen claiming that they were backed up. 

If he truly felt like I had wronged him, he must follow the proper channels. 

If I have been given proper notice of move out, then generally I prorate the days past the move out date based on the actual monthly rent that month.