Like others have said, 40k rehab budget on a property worth 55k would be considered heavy rehab.

STR income isn’t considered passive if you meet material participation rules, allowing STR losses to offset W2 income.

I consider potential investment opportunities in multiple markets.

Question 1: Is the maintenance of tall, 2-story trees, a part of the tenant's landscaping and lawn maintenance responsibilities or is it considered part of the property that the landlords are responsible for?

Also something to consider is what is the appreciation play looking like? 

BTW, if you have hardwood or even pine under the carpeting, you might consider refinishing the wood. 

You should consider a professional manager.

Duplexes are worth quite a bit more per sqft than Fourplexes as there is a larger buyer pool and it opens to the non-investor customer.

To refinance your Tesla under your LLC, consider lenders like Ally Bank, Taycor Financial, or National Funding, which offer business vehicle loans and may work with newer businesses if you provide a personal guarantee.

FEMA would only worry about the one that was considered my "primary".