Any roof is just a giant heat sink, and the last thing you need in AZ is more heat in July. 

You could also let all calls go to voice mail and only call back the people with names like Harold, Dick, or Linda.

It had it's uses back in the day but was never really a giant player.

The key, which @Dick Rosen and others have mentioned is screening.

If you need a Property Manager, I would like to recommend Dick Rosen of LHM Realty in Phoenix.

There's perhaps only one way to take down industry the GIANTS (along with their entrenched, 'system...') and that's with an ORGANIZED and determined "grass roots, effort..." not one person here and there offering owner or seller financing, LOs, or wholesaling, rehabbing, etc.

They often might, at most, file taxes jointly, but otherwise maintain segregated checking/savings/credit/etc accounts, and sometimes I've seen them have one giant 'money bucket' joint account that can be down payments for either spouse (because you can't use gift for down payment on an investment property) depending on what pops up, and which spouse likes it better.

Great idea Dick!

Especially with tech giants adopting forever telework and who know if interest rates may rise again one day.

No reason you couldn't start now, do the same, and have a giant cash flow machine at 60