It's a nice benefit while you live there, but it shouldn't be the deciding factor in what you do next...it can play a part in the discussion, but the much greater benefit is your ability to sell tax free on your personal residence with a 121 exclusion. 

Most likely you'll never have an issue unless the company/person doing the repairs after the fire cut corners.

I would personally keep the property unless it's going to be tough to cover the difference. 

Personally I am not sure what investing out of state looks like, and I would truly feel incredulous if I could get help from any of you amazing friends here on bigger pockets!

I would highly recommend staying away from anything being transferred from one person to the other directly.

This sort of ruins the appeal if you have more funds you want to safely earn interest on. 

I personally use batch skip tracer.

If you are doing this for your personal properties, I would consider Quickbooks or Stessa.

But I began this reply with IF, because if they are all cash-flow positive, I would personally not seek to pay any of them off early (depending on your age), and instead save that money to put towards obtaining additional properties.

My current rentals are all in my personal name with conventional loans.