You make your money buy, so good deals are often the most affordable (worst) house in a decent (best) neighborhood. 

Get to know you customer base(what kind of payment can they afford).

For turnkeys, I like buying in B/B+ areas, that are affordable to new homeowners (one of my exits), or attractive to for a lease option (another exit). 

how much can you afford?

(Forbes)Lower business & lifestyle costs than others.Amazingly affordable real estate for investment.Single-family, duplexes, fourplexes.3-year appreciation forecast of 9.1%.Around 45% of the residents are renters.The growing fuels the rental demand.San Antonio is also known for its low cost of living.Closed sales increased by 14 percent year-over-year.Compared to June 2019, San Antonio's average price of a home increased by 3%.Year-to-date, the average price has shown an increase of 5% to $278,395.In a year-to-date, year-over-year comparison, Bexar County faired well compared to Travis (-10.7%) Harris (-4.9%) and Dallas County (-6.8%.)Each of these counties indicates a decrease while Bexar county shows a promising a 3.4% increase.As predicted, June has shown to be a strong buying season.

Affordable means something different to every one. 

This is a get out of jail free card for dishonest tenants.The only out for landlords is to sell and have the new owner move in, forcing an eviction.There's a good Times article about how small-time investors cannot be compared apples to apples with corporations/wealthy investors - and how moratoriums are hurting small landlords which is generally bad for affordable housing (strapped landlords will be forced to sell) - but I'm not sure if linking articles is allowed here.

There will be big opportunity for those who can deliver affordable housing in the coming years.

If her unit is filthy why would you temporarily move her into a renovated unit to destroy and then give her a newly renovated unit which she can't afford and will also destroy. 

Housing around there is pretty affordable actually.