If it's a small business (such as breakfast), do it yourself. This kind of business usually earns hundreds of thousands of dollars a year. Because the income is too low, it may take a long time to recover the cost if you join.

If you want to make more money (dinner, hot pot), it will be better to join. This kind of industry is generally deep in water, and it is easy to die if you do it yourself. If you join, there will be standardized procedures and the chances of survival will be extremely high. The annual income should be several million. Of course, there are many fraud companies, so be wary before joining.

If you want to be bigger and stronger and make a brand (any project), you can only do it yourself, and you can't get the core technology by joining. The annual income of such projects is in the tens of millions, and hundreds of such companies close down every day in the country, which is risky and tiring, but once it is successful, it will make a profit.