There is similar thread at the moment about the poster thinking about opening a shop. I posted on it just a minute or to ago so I have copied my post across for you to read. My business is not a cafe its a garage, there have been three local cafe's near us open, one successfully for about a year or so now, the other two bombed quite badly. the three of them were all open at on three different occasions so weren't in competition with each other. but the post I used on the other thread is below, which will give you my views based on my experience:-
It can't harm to try op, but have you thought about the costs involved in just setting up the shop, that's before you have even started making money. Would you be working all the hours yourself? If not you will need to find, train, retain and pay staff. Many new start ups can take a while to turn a profit and on some occasions owners take a minimal wage for a while until the finances of the business settle.
If you do have staff, they will have statutory rights, as the business owner you have none and if anything goes wrong, you need to step up.
I can understand you questioning your current working environment, but there are pro's and con's on both sides and try not to just see the benefits of working for yourself. Depending on your life style and the business you run the pros and cons can vary quite a bit. The money you can make, staff retention and demand for your service can also vary dramatically and what seems to be a good idea may not actually work.
Sorry OP but I have done both, currently running my own garage and have done so successfully for the last 9 years, I can enjoy the benefits but truthfully, if I could go back to being an employee with the knowledge I have now of running a business I would do it at the drop of a hat, I now long to be employed. Why? I am now sick of the responsibility, not having the right to leave, sick pay etc, having to constantly worry that our fortune may turn, having to deal with staff. The list goes on I'm worn out.
I have even on occasion came from my sick bed to cover a staff member calling in sick and also had to take my toddler in to.
God I do make it sound bleak!!!!
The grass isn't always greener.
Good luck though with what ever you choose to do, either way.