EITHER/OR Option for Damage Hold OR Damage Charge

I would like to have the option for non-AirBnb bookings to offer the guests the option to 

#1) Do a damage deposit of X

OR

#2) Do a non-refundable charge of Y

This gives the guest the option to do a hold on their credit card or a charge (which would be less than a hold) but would be non-refundable.  

THIS FEATURE WOULD BE A HUGE PLUS for guests!