I host a wallet via Bitcore for customers. How to pay the fees for my customers?

I am hosting a Bitcore instance for a Bitcoin ATM located in Washington.

I would like to have my company pay the transaction fees for my customers. Each customer has their own wallet, and all of the wallets are hosted against our Bitcore instance.

Is there a simple way for us to pay these fees? Ok, haha, I’ll even take non-simple. I think it’s an important way for us to help our customers enjoy Bitcoin and help the currency spread.