Looking from the customer point of view, I would urge you to consider what value you are bringing with a subscription model. If I understand you correctly, you

Looking from the customer point of view, I would urge you to consider what value you are bringing with a subscription model. If I understand you correctly, you want to charge an ongoing subscription for a one time piece of software. It sounds like you’re not including updates or improvements, just a one off install. My personal opinion is if I’m buying software designed to run on my own hardware with a one off install, I only want to pay once for it once. I don’t want a subscription. But I also don’t expect updates or infinite support. If there is a subscription, I expect updates (bug fixes, new features, support for OS updates, etc). If the maintenance side has value to me, I’ll pay for that subscription. One example is Solidworks. I pay a few thousand dollars for the “base product”. It’s mine to use forever. But I also pay a yearly service fee. That subscription gives me: software updates (new features and bug fixes), tech support, etc. I get value out of those things so I (gladly) pay for them.