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

Even new machines can experience issues, and when those issues mean that water is leaking all over your laundromat, you’re going to want to respond to that quickly.It may not be that your laundromat requires that many hours in a week of actual work, but the times your laundromat will demand your attention can often happen unexpectedly.In a typical week, we would work 7-10 hours on our laundromat, either being there physically or working remotely.

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

I get it with the builders.. we saw that big time in the GFC however the deals I saw was them walking away from substantial EM deposits deep into the 6 figure range.. we did well picking up some lots from lot developers who had this happen to them..

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

By then market rents moved up to $1,150 - $1,200 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.

Are you in a market where water lines could freeze in the winter if there’s no heat?

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.