No offense, but I don't think this is really the business model for this.  Normally with lease to own, the person leasing has something that they are bringing to the table.  They are putting in some sweat capital.  In this case all that you are doing is plugging the equipment into a wall though.  The person could easily just plug the equipment in at a data center and get a full return on the equipment in a few months instead of going through you and waiting for a year to get their money back....