We have implemented credit and debit cards so tenants can pay with ACH (bank accounts) and credit/debit cards.

Welcome to being a landlord, @Andrew DeB. It

I did month to month agreements, so it wasn't as scary to take a chance on people, but mine had verifiable school records or employment offers.What you could do, is take the money but write up a month to month agreement, and you still reserve the right to kick them out with 30 days notice and refund any unused pre-paid rent.If he has come to work, he will get a social security number, so you can ask for it.  

Also we met with the park owner when we purchased and negotiated a lower HOA fee if we prepaid a full year.

I deny evictions unless they provide 6-12 months of prepaid rent...

It's free and doesn't require linking bank accounts—it uses debit card numbers to both make payments and to have money deposited into your bank account.

I have a coworker who's debit card was compromised and drained recently, so I am going to talk to her tomorrow and see how the bank handled it and what the timeframe was.

We had one tenant who was supposed to be paying $500/ month buy had prepaid his rent at the rate of $430/month, which we did not discover until we got the leases.  

You then look for another new tenant, and you have to reimburse the leaving tenant all of that money they pre-paid, less rent and advertising fees to find the replacement.  

When you purchase the property, lease agreements, deposits, and prepaid rents all get transferred to you as the new owner.