Speaking from a position of knowledge.....I'm in some related fields and I would tell you to skip this one. If you go the franchise route you will *never* make real money. If you go it alone as a startup in commercial/office cleaning you will have a very difficult time against said franchisees and illegals working for nothing. Illegals everywhere. Commercial cleaning is basically a commodity at this point.
Someone hit the nail on the head that you need to find something you have passion for....just saying I want to be my own boss with half your heart in it is a recipe for disaster.
great advice. something to keep in mind is that when you work for a business (as opposed to owning your own) someone else signs the paychecks and you have a contract that protects your finances. in most cases, it's much more stressful to try to make payroll for other folks than to have a workplace that isn't fun or a boss that is a dick.