Then you actually, if you are not sure, you can find a partner to do it with. In this case, you may not make much money, but you don't bear much, half for everyone!
Or do a careful investigation around to see the surrounding consumption level and where the environment is? These must be found, and then what is your own cost? How much can take-away food sell in a day? This is very important. What matters is how much you can do with your own money! These should be observed slowly by yourself!
Finally, I want to say that since I have chosen to do it, I must do it happily. Don't be afraid. The more so, the more impossible it is!