The silly thing is that a fair amount of these small businesses (10% or so) will end up growing into some pretty large companies. The doggy daycare that I take my dog to occasionally started out as just one guy with one location (he even slept on the floor next to the dogs for the first year). Now they’ve got more than a dozen locations in three states, and the guy is a millionaire.
Just do what you love, and even if you’re not trying to become a millionaire, it might just happen anyways.
Well, now I know what to do if the software doesn’t work out :-)