Having your own business assumes that you are busy 24x7x365 at least for first years! You should care about everything:

• service-goods quality you provide,
• customers' satisfaction - attraction and retaining
• marketing,
• costs management,
• staff management (salaries, motivation, holiday time, legislation, substitution,...)
• legal matters,
• tax matters,
• Huge competition,
• Fraud and theft,
• Business development!

You should plan and execute in the best possible shape, otherwise you will be swallowed by thousands of competitors! All this assumes a lot of stress!
90% of business do not reach a mark of 5 years age!

But anyway, it is still the best option for a young and dynamic person! Think about the business and do it! I bet that at least your 10th project will be successful ;-)