I worked them, remodeled them and made very little money and eventually sold them for little to no profit.

Here in Maryland, after more than 20 years of failure, lawmakers made it illegal in 2020. 

Made another post covering the question here and few other items: https://www.biggerpockets.com/forums/12/topics/1220253-permi...

I haven't made my first payment on my 3rd house yet and super happy with the results.   

No change to the title was made at that time. 

After 2010 there were more deals than many of us could buy, so it made sense to go through the process and then sell it to someone.

And therefore competition among tenants can create significant challenges, like...Businesses may struggle to establish a unique presence and loyal customer base, and a lack of profitability due to nearby competition will likely lead to higher tenant turnover.

There customer service responds timely but I'm usually stuck with more answers than questions. 

They made their money.

I have found a well-made checklist for you to go through: https://www.nar.realtor/law-and-ethics/cybersecurity-checkli...I'd like to emphasize on some point though.Section A:- These are non-negotiable.