After they were purchased, they were filled out, sealed into envelopes and mailed to me via certified mail.

You really want a rookie putting a waterproof seal on the top of a building?

Last weekend it stopped to work again but heard loud sounds in the air handler.

They typically build life-long seller-lead businesses in their market and if you work with a few of the top-agents in multiple locales, you can likely get a good stream of leads going (constant new-business with various owners who might be interested).

There are many side hustles, and there is no "one fit all".Real estate investment is a long run and if you like to go there is neither is easy nor passive.

It's important to carefully consider your options and what will best help you achieve your long-term goals.

@Daniel GrimsleyEvict asap - never let a tenant go that long as they will feel entitled

In Ohio you could manage properties for her even if you are not a licensed real estate agent working under a licensed broker so long as you were her w-2 employee or you were doing it for free.

The last fund I worked for who pulled and analyzed AirDNA found a lot of discrepancies and false data.

And this is going to get really murky, because the owner claims that he had a long-term tenant, and that tenant was then doing the rental arbitrage deal.