Well, I'm a Real Estate Agent and also own a restaurant. I got into real estate because it has been in my family for over 30 years. When I was younger, I loved the restaurant business. Paul is right, it is the number one business start up to fail.
Breakfast and lunch places are even harder to keep afloat. It all depends on the type, location, population, saturation in the market and so on. A great place will succeed if you work hard, have a great following and great food. I just learned that 4 of my favorite restaurants in San Diego, all which had been open for over 20 years, are all closed due to the economy and what they had to do to stay open was simply not happening.
It's a risk, but sometimes, risks were meant to be taken. Good luck!