You do your research and know as much as there is to know about how to run that type of business and who the competition is in the area. The less people doing your business the better. Investigate rental space cost for your business if needed. Figure in utilities. Then draw up a business plan with how much it's going to cost to run your business showing expenses and projected income. Then if you have to find financing you might apply to the SBA, Small Business Administration. Remember, it takes awhile, several years, for a business to become established so adequate operating capital is necessary to cover expenses, employee pay and to pay yourself a small amount. Most businesses don't make money until after 3 years. Also know that most businesses fail from being under funded. Be prepared to give it every ounce of energy and effort. It won't be easy, but worthwhile things rarely are. You might find out if you have a local chapter of SCORE, affiliated with the SBA. It's a mentorship program. Best of luck.