I am really just looking to avoid the worst of the worst areas (anywhere with open air drug markets or active gang warfare / prolific violent crimes).

His word isn't worth the air it displaces anymore. 

😂Plenty of lovely folks there, plus it's where Cannon Air Force Base is located, but we soon discovered that just having a base nearby didn't necessarily make for a lively real estate market.Shortly after that, we adopted our MUCHAS criteria:M - Near a military baseU - Has at least one college or universityC - Has a Costco or equivalentH - Has a hospital ranked at least as a Level II Trauma CenterA - Has a commercial airportS - Has a Sprouts (organic grocery) or equivalentThis has led us to look at often-overlooked markets like Lubbock, Texas and Augusta, Georgia.May be worth a look for you as well!

I hear people talking about air flow etc.

It's performed well (except for the air conditioner broke) but was also more work than anticipated.Part of the question with regards to house-hacking is your current living situation. 

Would even pay for their air ticket and help them buy a house.  

Items cannot be stacked against wall prohibiting natural air flow to guard against mold, etc ?? 

It is typically caused by excess humidity (showering or cooking) and can be resolved by teaching the tenant to use ventilation fans and airing out the home once a week for 10-15 minutes.

Ultra wealthy to me is the exact opposite of what got you there.  5/3 house in Nice and another in Buenos Aires.  

Air b and b 4.