One thing you COULD do...
It's a lot of trouble in the short term.
In the long term it's pretty cool

Coinbase is affiliated with a bank in SanFrancisco that offers the ShiftCard
(I think it's called)

the way it works it just like an other Visa Card at point of sell.
Behind the scenes magic happens..
The CUSTOMER's account with CoinBase is automagically charge what ever the amount is...sold..then converted to USD and the transaction is completed in $$$.

It takes some setting up.
The customer needs to set up a coinbase account
(for which YOU can get a $10 referral fee)
then set up the ShiftCard account..
The customer can decide to use BitCoin, Ethereum OR LiteCoin
so the high BitCoin transaction fees can be avoided.

it worked for me for a while.
then I decided to do something else.