I can't resist putting in my 2 cents here. I tried! I left the page then I came back.
First I agree with most of the things people have said in response to your post. Even when one piece of advice contradicts another. They are all true. It is the beauty and art of the restaurant business! Most everyone is right, there is no foolproof formula (despite what the consultants who, 9 times out of 10 have never even worked in a restaurant, would like to tell us.), you can have smashing successes in this business and, here is where I would closely study David Jones advice, lose your shirt, your wife's shirt, well, everybody's shirt. But, what business is that not true of? This is a business like any other, you can succeed and you can really mess it up.
So the key is , like any good scout, "be prepared". But, IMO, don't over think it. So Kuan is right too. Don't waste the money on some school that is going to teach you the "Consultant-Business-School-Proven-Method" to "Open-Your-Own-Restaurant-and-Get-Your-Own-30-Minutes-On-TheFoodNetwork". This is my pet peeve in the "new" restaurant culture. And, again, IMO, if you have been through Law School and practiced . My first question is: haven't you had enough of that? And, you probably know a great deal of the ABC's of business even if your knowlede is not overly specialized.
Passion, vision, some good old-fashioned common sense and a bit of dedication, well, maybe more than a bit, will get you places in this business. My guess is that you are not looking for a fast-food franchise so really think about what you know, love and wish was available in your market. Then, do it. But, keep clear of the standard investment strategies, again, IMO. An "angel investor" , a good operating partner, vision, hard work and a little luck will get you places no 2 year Restaurant Mgmt course or Consultant Advice ever will.