Cheaper Firewalla for MSP?

Is it possible to create an MSP program so we can pay less upfront for the physical units? I run a service business, and paying everything upfront for my customers is not ideal. I charge them a monthly maintenance fee via your MSP program, and what I think is reasonable is to sell us the physical unit at a much-reduced rate, and we can rent the unit via a monthly fee.

I know some consumers may not like monthly fees, but for us providing a service, this will help us grow faster.