According to Franchise Business Review, the average annual pre-tax income of franchise owners in America is $80,000. Only 7% of franchise owners earn more than $250,000 annually, and 51% earn less than $50,000.
Depending on the type of franchise, you may feel the need to play an active day to day role in order for it to be successful. However, if that's not what you're looking for, there are plenty of franchises that allow you to be a business owner while maintaining your current forms of income.