Perhaps try to build your own and run that instead? To be honest I think you'd learn more about how to buy a business than how to run one if you bought one instead.
If you buy a business, you have the opportunity to scale and fix issues (code, business model and otherwise). Starting something from scratch involves a lot more work and skills.
Starting vs. buying/scaling requires a different set of skills and perhaps different work, but roughly the same amount as starting. Source: I've done both.