It is a profitable business plan.
You initially started the commercial cleaning company as a way for your two older sons to earn money while they were working their way through college. Ten years later, however, it is going so well that you now have more customers than you can handle. In fact, you are constantly looking for new employees.
You have found some kinds of jobs that you really enjoy, and others that are simply not worth the hassle. In your memory, the worst job you remember sticking with far longer than you should have was the gymnastics club. You ruined vacuums, could never get ahead on keeping the mats clean, and in the end simply told the customer that you would have to pass.