I second Cpatjeff, we opened a Thai Restaurant and we ran it for over 3 years. The planning took over 1 year before we moved out. My wife was the chef and from Thailand and I came from Yorkshire in England, so I know of hard work. It was hard work but very enjoyable and the people you meet stay with you for life. You need to plan and ask the right people the right questions and hope to get the right answers. Things do and will go wrong but we found out we could work them out. The most important things is getting the paper work right from the start.
If anybody would like more information PM me
John and Thipaya Jones
(Tastes of Thailand 2003-2006)