Hi, I have a different thought on your question - you are NOT having them subscribe to a service. It seems to me you are wanting to offer them different lengths of time for renting some equipment.
I believe that would best be handled by the options that are built into the core products - some info is found here:
https://abantecart.atlassian.net/wiki/spaces/AD/pages/9568257/Manage+Products+OptionsA rough example:
You have a product - lawn mower, you want to offer it for half day, or 1 day, or 2 days or whatever - each length of time can have a different pricing point
and you can add a option for delivery . or ask us about our delivery extension which may be of interest to you, currently not available thru the MarketPlace.