Finally checked out Southside Wheels (Shreveport, LA) after seeing their lot on my commute for months. They keep around 69 vehicles, mostly in-house financing (buy-here-pay-here). They were totally fine with my mechanic doing a once-over, which honestly settles half the trust question.
Lot address: 4869 Credit Row, Shreveport, LA. Visitor parking: Front-lot customer stalls facing the office; overflow on the side street near Shreveport lot gate.
Paper side: licensed with the state (looked it up), about 83% of stock has title in hand per the office, and they offer a 6-month powertrain warranty on newer units.
Overall: good people to deal with. 23 years in business around in-house financing (buy-here-pay-here), doc fee $499 and it's on the window sheet, no games. I'd send a family member there.