There is so much to say about franchising it would take 2 days to type but the first thing you need to realize is that a franchise is not about cleaning. It's about selling the franchise. You sell me a franchise.... I run it for 6 months and see that I can't make money.,.. so I want to get out of my contract. You say ok for $5k (or what ever) you can give it back... and they continue the process and continue to make money. Or, sometimes it works a little different but the 'just' of it is this... the guy that buys the franchise more times than not, makes $10-$15 an hour which makes it impossible to have any employees. Franchise is a modern name for hustle. There are $15 kits to franchise that will end up costing you everything that you've worked for and there are people that will do it for $35k, $60k, $500K and up. Franchising is very tricky so don't be fooled by thinking it is about having clients and making some money.
If you decide to do it... talk to 3 attorneys before you decide which one to go with.