I have been called by the Grounds Guys and many other franchises. When you buy a franchise you are buying the brand and their systems. You may also have access to a "coach" or manager to answer questions. You are not buying accounts or salesmen to help you get accounts. You may also get fleet pricing on equipment and vehicles.
A franchise was not for me as I have my systems in place and my company is established and is a known brand in my area. I already get fleet pricing as well.
I do feel some people that don't have these already in place can benefit from a franchise. The name is known and marketing materials are ready to go. Just keep in mind nothing is free...
On the other hand these systems are not hard to build and you can build a brand with some hard work. Local Score chapters often have free coaches available or you can hire a coach much cheaper than a franchise.