Generally there are multiple units for each "zone" if you will when I've seen them installed.Regarding your problem at hand, I personally would simply adjust your plan to move and make your initial plan to get the current issues resolved, while costly now, in the long run holding onto the unit will likely pay off. 

This might give a one-time (non-scalable) boost to cash flow, offer multiple value-add options, and allow the house-hacker peace of mind, via the assumed mortgage, in long-term breakeven or positive cash flow in the event that the value-add plans end up not being executed, and/or the person has to move out, and rent by the room or STR become unavailable for some reason at a future date.

What if the person staying at your place signed a contract but their 1st payment check bounced.

If it is a breach of contract to do such action, no, it's not true or accurate to say a person "can" do that anymore than it is to say a person "can" rob a bank.

I know my personal tax accountant isn't knowledgeable enough for property investment write-offs.

We have done it both ways where we fund purchase and they cover rehab but if the individual is less experienced we do not do it that way, we have them put more money into the deal from the start and fund the draws, reason why is we also had a deal where the person said they would do this and never did anything and property sat and loan matured and it was a pain.Just recognize you will still not get 100% financing for the purchase, so you are putting money in up front. 

It can be personally designed post cards or it can be letters. 

The key is to identify personal property from real property.

The properties in OK, which are roughly 30-40% smaller than my personal residence are only about $400-$600 cheaper than my FL insurance.

Would even be happy to meet in person since we are in the same area.