Why take on more liabilities? The ‘profit’ you would receive would be a pittance unless you are going for the ‘gym membership’ recurring subscription service.

You are only setting yourself up for headache in the long term with little benefit unless you have a large client list to make all the time, maintenance, etc worth it. But if you can get it so there is little effort on your part, getting an extra handful of dollars a year is still a handful of dollars I suppose.