@Daniel Green some good suggestions and really high performers on this thread, you are in good hands. 

My understanding is that if you've given the neighbor written notice of the need to maintain / remove the tree, if it falls it's considered an act of nature (high winds) and you have to deal with it.

I’m targeting assets between 25-100 units located in high-growth markets that exhibit strong fundamentals.

The behemoth cabins in the Smokies are super cool, but other than high season, it's mostly weekends.

Gutters are a must, I would highly recommend installing them on your property if you dont have them already.

I highly recommend an attorney to draw one up as each state and each property can have unique issues. 

Maintenance and admins fees are high.

Educate yourself with resources like The House Hacking Strategy and practice analyzing deals using tools like BiggerPockets calculators.

If you live in a high cost of living area, investing in more affordable out-of-state markets can be a great strategy.

Honestly with an interest rate like that you could even not pay off your primary and put any excess capital in a high yields savings account and be financially further in the long term.