I've found some success here. Here are a couple of my findings:
Vetting is different. Throw credit scores out the window and look at "credit stories" to determine the right candidate. Medical reasons are the number one reason for bankruptcy in the US. Paying attention not just to the what, but the why.
Do shorter terms. I don't go above bi-weekly. Not semi-monthly or monthly. I go only weekly or at most bi-weekly. This helps people budget better and gives me more touchpoints because I collect in person in cash. This lets me identify problems early on in regards to broke down cars, etc. I've also dealt with programs with people who are coming out of great rehabs. Two of the guys wound up staying for years after and they're doing amazing. I am proud of them, but not all of it is a success story for everyone. I keep things week to week with no obligation to them beyond what they are paying ahead for that week.
I offer incentives. Many of these people don't have the best credit for whatever reason. If they want, I put them in a program called Boost that increases their credit score every time they pay rent. This helps the people who struggle to even get prepaid credit cards.
Be aware of other programs, how they work, criteria, etc. Food banks, rental assistance, etc.