Good Tenant, but can only pay cash

[Adam Reed]

I bought my duplex 3 years ago as a house hack (before I knew what a house hack was). I inherited tenants who are fantastic. Quiet, clean, always pay rent a few days early and have been okay with hefty rent increases (nearly 100% over 3 years).

The only problem is they can only pay cash. This hasn't been an issue up until now, as I wasn't planning on growing an actual business from any of this. Things have changed (thanks Bigger Pockets!) and I'm getting myself organized for the next few investments. If these were new tenants, they probably wouldn't make it past the initial screening. 

How problamitic is this? What would be the best way going forward to collect rent from them?