Would this be freshly canvassed work or jobs you've been servicing yourself for a while?
Cheers
I would want to clean freshly canvassed work for at least 3 months before passing onto a franchisee to make sure they were "proper" customers. 
That's not your problem. You get the work, pass it on. Why put yourself through 100's of first cleans when you don't have to.
Also, its a learning experience for the franchisee, if he can get a house that hasn't been cleaned in years right he can get any house right.
Your putting unnecessary work on yourself and unless you have a large alternative income to support the income you've become used to, its not practical. On top of your existing round, you will be cleaning 1.6-2k of new work as well? About 150 first cleans plus your existing round.