PayPal as a transfer account at the end of the month.
The once a month payment transfer to a PayPal account.
This is already an option for international users since they are incapable of receiving ACH via the normal process. The fees paypal charges make this an unattractive option for domestic users.
Can't it be the users option to use paypal or the current method in place? Ask paypal to negotiate a bit...may find they get more users, which will bring more money for them in the end.