Purchasing expensive treatment machines before knowing if they're really needed. Sure, you want to have the best equipment and a large list of treatment services to attract and service as many clients as possible. But, is your matching shopping list more than it needs to be, especially considering you don't know how many customers will want the treatments you're about to finance? Have you looked to see if there are better, less-expensive options or other ways to produce the results some machines claim to? This is one area where it's best to take time to research, check in with customers and avoid a costly impulse purchase.