This is my latest struggle. My prepay packages have fluctuated a bit in the last year, we did price checking and testing and found that if I only had 2 packages for sale for remote support, it was best. But then those that buy the smaller packages (under $300) didn't want to buy the $500 package. These are not cheap clients, they were just judging the price points with their needs and determined the $500 were too much.
Then I thought about monthly plans and sent out a marketing pitch to 5 of my clients to see what they thought. 2 that replied back said they preferred the prepay plans.
Waiting on 3 more to reply back, but am thinking that I will just stay with prepay and easier on the invoicing and keeping up I guess.