You can start your own business, and be your own boss, as a concrete cutter. Concrete is usually cut, by big powerful hand held cutting machines, with diamond tip cutting saw blades, that are portable, and you can carry in a trailer or back of a pick up truck.
Lots of home owners and construction people need concrete cut with a straight line, and don’t usually have their own concrete cutting machine to do the job. Someone remodeling their driveway may want to cut a section out with a straight line, that is where you can come in, and offer them your concrete cutting services. You can look for new concrete cutting machines on the internet, and you can also look for used machine in heavy equipment catalogs and magazines, or also online. You can rent a machine from equipment rental stores, but it would be cheaper to buy your own, as soon as you can afford to.
You can contact people in the construction business, like cement workers, concrete pavers, bobcat and dump truck owners, etc…, and let them know you are in the cutting business. You can offer them a commission for any jobs they send your way. Make sure you have nice signs on your vehicle so customers can call you when they see you out cutting concrete on a job.
You can market and grow your business so that you have someone else running the concrete cutting machine, while you’re getting more jobs. Later you can add services like concrete coring and drilling.