It is possible to start and operate your own business, working on your own, fumigating houses for cash. You need to find out all of the applicable laws for your area, as fumigation is a serious business.
Usually, if a person buys, or sells a house, it's tented up, which means, you pay the entire house with a canvas-like material, and be sure nobody is inside the house, no pets or people, before you begin to fumigate your house, that's the main thing. You can find out the commercial termite treatment via https://www.millspestmanagement.com/termite-pest-contr.
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Usually a house or building it entirely covered, and substances are put off within the enclosed environment, exactly like a big circus tent, and the gases inside are supposed to kill anything indoors, including pets and humans, so that's still the main part of the job, ensuring nobody is inside, once the gases go off.
You could contact pest control companies in your area that don't offer fumigation services. Offer them, and tell them you'd give them a portion of the bill, for any tasks they flip your way, and you do.
You need to have pleasant signs on your automobile saying you're in the fumigation company. When you cover a home up, that is the very best place to hang a great big sign.