Upon reflection, the fact that this might be a real business does not particularly surprise me too much. After all, businesses have been created on less. (I’m thinking here of Pet Rocks and smartphone apps that do nothing as examples, and which have made a mint in their day.)
So, sure; if you control the costs well enough, work out the process and controls so that you can deliver a consistently high-quality service and maintain repeat business, hire and train willing and able employees as your force multiplier, and then market like crazy and find customers willing to pay … you can make a business out of nearly anything, I guess. This would pretty much be the proof of that.
But … franchising? Buying a franchise? It’s not like dog shit is a patented product that you need a license to collect the stuff. I can’t imagine the specialty tooling that would be required on which a patent might be applied. And it is simply beyond me that the process can be in some way “branded” to an extent to command the kind of “brand loyalty” that would make a franchise business even possible.
So, no. I don’t see the kinds of margins in a business such as this that would make it a feasible franchise. If the market exists for the service, there are no barriers to entry that I see. Start picking up dog shit and do your own marketing, and cut out the middle man.
Someday you’ll be able to tell your grandkids, as they come to visit you on your palatial estate, “Yes, kids, this is the house that dog turds built!” Enjoy that dream.