old time pricing
Doing a one time job, may never need this again. However, look at Adobe and ask how much bigger would their business be if they could get all the low hanging fruit, for $0.1 per compress. Think of how Apple sold music for one song at a time. Old telephone for $0.1 per call. Need to find a way that the infrequent customer will not be beaten by the heavy user that belongs on a monthly or quarterly plan, and there are no resale of the service. The task is not the hard part, it is not being beaten by folks in the market place. Partner with firm that can collect nickles and dimes and forward all that to you.