It sounds like it could be a good change for him . It is worth looking into for sure. I'd suggest looking at how many other similar businesses there are in your area that he might be competing with. Also, have a chat to an accountant, they are great telling you what to look out for and what hidden costs are involved.

Don't forget to factor in the time it takes to market/advertise the business and also the time it takes to complete paperwork and chase up invoices etc. It's probably worth asking the companies you are interesting in how much time you should factor in for admin type stuff.

I don't know anyone who has bought into either of those franchises, but they are both very recognised names. We had friends who bought into a known cleaning/maintenance company and did really well. They went on to bigger and better things after a few years thanks to first buying into that franchise.

Good luck with decision making