They have median household incomes of 52k and 55k respectively.

Hey @Augusta Owens Bigger Pockets has been so valuable to me in my own journey, so you are in the right place.Ive been hosting an investor meetup the past 3 years and it's been a great place to collaborate with the like minded individuals and collaborate. 15-25 people show up each month and range from new investors to people,e who have been investing for decades.would love to connect and get you some more information! 

You can get solid cash-flowing single families in the 90-120k price range and duplexes in the 130-180k price range.

I do not know San Antonio’s property tax rate but suspect it is in that range. 

I'm going to assume your PITI is somewhere in the $700-$800 range.

So assuming your son has low debt, then he should be able to qualify for a house in the low $300K range. 

Next, your using limited visual range photos.

I’ve been interested in real estate for years and have invested as an LP in several projects, ranging from residential single-family homes to NNN properties and flipping.While I haven’t owned any property yet, I’m hoping to take that step in the near future.

As a resident (who travels a lot) I would say the Midwest does not have the attractions like palm trees & beaches (the great lakes are cold) or amazing mountain ranges, which often come with some disadvantages like high cost of living or hut/humid weather, stroms etc. 

The guide should help you out in that respect.