You work just as hard, but in a different way, less stress, and 90% sure you're actually going to get paid than as a recent buyer's agent.

It can't be stressed enough. 

That made all the stress and anxiety worth it... the difficult tenants/roommates, constant noise, roommate drama, and lack of peace and privacy.This approach reflects the balance between comfort and profitability that Craig Curelop discusses in his book, The House Hacking Strategy.

I’m active duty Air Force with four properties.

It's always smart to talk with others active in your market to get a real understanding of the local situation. 

Scott Scheel has a good course about commercial real estate, but he concentrates more on apartment investing in his course while he is actively buying retail buildings and not apartments.The loan default rate on apartments is 58%, so before you buy an apartment building think why is it so high.Another avenue to consider is mini storages if you want to own real estate, the default rate is only 16%.

So even if there are issues, they know I am actively working to solve it and not blowing them off.

A few lesser names out there like RealNex have some features, but honestly didn't find much value there outside of their listing platform if you're an active broker in that space.

There are "hot" markets where PMCs can just put a rental on their website and get acceptable activity.

Linden is seeing a large amount of investment activity within residential 1-4 unit properties and newly developed facilities, which were ignited by the ONE Linden Plan.