You can not do a bar restaurant job as falang , if you start your own business you need at least 4 employees ! You can be shareholder without employees but in this situation you can not work ! If you have 4 employees you can get workpermit for yourself , you have to pay about 3000 bath a month + your accountnant 3000 to 5000 bath + you have to hire an office where your business is located ...around 10 to