That will depend on things you won't know until you start.
How much do you start with, what's your burn rate, how long until you get revenue, are you bootstrapping/funding, your personal cost of living, etc.
Running a business involves risk. Risk to your comfort, your mental health, physical health, financial health, etc. Closing a business is the end of all of that, not the start.
Why do you want to scratch that entrepreneurial itch?
