frankferma

Guys thanks for the comments and advice. I'm going to avoid to sell a perpetual license.

Perpetual license on the core of my service, not the code and not the whole SaaS, I will provide the core service inside a virtual image

This is one of the things I want to avoid, I don't want to be out off business and generate a problem for my current client, the service is critical for them

Why not? My net profit is very low with the monthly payment

Why not? I forget to say my net profit is very low