Hi Jason!
Welcome to the forum and apologies for the non-response.
I think you may have hit on a good idea, in offering a second service.....the advantage you have over most of us is that you are already in business and therefore have already got a 'foot in the door' so to speak.
Best bet I would say is just to get out there and ask both exisitng and previous customers what they think of the idea and would it be something they would take advantage of, or even just ask good old Joe Bloggs in the street (or on the phone)
Good luck!
Jan