Esats and Ecash are probably going to be the best option soon. It's effectively a way to send private digital fiat and sats in and out of a custodial lightning node. But might be a little bit before this is up and running.

In fact running a mint for your local businesses to be able to transact with digital money will kind of be how open banking worked in the 1800's and would be a great business to run for your local community.