It is better you go ahead with own school rather than franchise. Believe me it's better in so many ways. BUT you should have your own BUILDING.
If you into EARNING only and want money instead of providing the education than you can go ahead for Franchise. City Schools franchise will cost you neat to minimum 20 lacks, educators by Beaconhouse will cost you near to 15 lacks. And the costs go in bracket of 15 to 30 lacks. The problem with franchises is you cannot be creative there is nothing new and you have to deal with 10 years of contract in that you pay 45% to the BSS or City school for NOTHING. NOTHING includes paid trainings etc.
In self schooling you can be creative, hire your own Teachers, make your own rules, decide what is best for students of particular area. Each area's students and parents have different manners to different priorities. Self school system is better if u want to put education above your earning. I paid salaries of my staff for 3 years from my salary. But in the end it pays bro.