I am currently designing a data logging system for an interested party. The cost of the items assembly and purchase is about $100 (board, power supply, 2 sensors). I want to get lets say 15$/month subscription out of this, to offer analytics, SMS, and whatever else comes to mind in the future.
- sell him the equipment and ask for a subscription? (without a subscription the data logger is useless)
- lease him the equipment ($100 once) and ask for a subscription? (without a subscription the data logger is useless).
- sell him the equipment with a minimum functionality and offer optional subscription? (what is the new price $100 + ? in case he does not want the subscription?)
- do something completely different?
PS. I want a subscription...