So many people get hung up on the cash flow.

We suddenly had 2 homes and began exploring what our options were and that is when we discovered the intriguing world of REI and tapped into Bigger Pockets and Better Life Tribe, etc. to begin our education.In the time since his death and the probate process we have been paying his mortgage off and selling items from the home which we have been maintaining.

If not rent controlled and  you can give notice you might want to give notice if you have a lot of people moving in and out.  

That loan will have some bank hand-holding that people dislike (annual reporting requirements for the first few years, all rent checks must get deposited into an account at that specific bank so they can see it coming in and have an automatic "early warning signal" if they drop off, etc), but hey in their case I'd say it wasn't unwarranted, their only track record is that of mismanaging after all. 

So many people (including me) are complaining that they're not getting the bookings from Vrbo that they used to, and now Vrbo want to block some more days that won't get booked on their platform. 

Do deep research to find areas good for investing, with lots of people renting, new jobs, more people moving in, steady money flow, and chances for the place's value to go up.

Do people use generic documents?

Many people have invested in RE within a pre-tax and Roth account. 

Find like-minded people that are also looking to or already investing.

Assistants to property managers learn about dealing with people who rent, agreements to rent, keeping places up, and looking at properties closely.Real estate agents get to know the market well and talk with other pros in the field.