Buy or inherit and hold all their lives while working the properties for income.I've seen teachers, firemen, software engineers and all sorts of people utilize both strategies successfully.

You can get higher rents with this strategy and the government is paying most of your tenants rent money directly to you. 

This  book offers a comprehensive introduction to the world of real estate investing, covering various topics like property identification, financing strategies, and tenant management.

But, if the facts are on your side, you should win.

I should mention that the strategy would be LTR

Most of the opportunities that I see are POHs, and theres a strategy I have heard about to convert those to TOHs.  

I own two fully paid out single family homes through a 1031 exchange, my original thought process is to keep them long term since that's been what I've done in the past, however I am contemplating changing my strategy since I'm seeing a lot of movement in the local real estate market that people are flipping them within a month of their purchase on the home. 

I'm sure you can learn all about best strategies, tricks, tips, etc, but I'd suggest focusing on the baby steps right in front of you.

Any possible strategy I have not yet considered? 

While I am currently looking for multi-family duplex/triplex with an eye to use BRRRRR in the north shore area (north of Boston suburbs like Chelsea, Revere, Saugus, Swampscott, etc) class B/C properties, I am wondering whether this strategy in a "tenant-super friendly" state like Massachusetts's with current high interest rates (and therefore high construction/materials/contractor costs) is worthwhile at this time.