I agree with the way of the (lack of) home cooking. Truly amazing the amount of money people spend on food out and the crap quality of most of it.
As far as the restaurant, a few things.
My friends are telling me the same and / or my brother has an old Matco tool truck to do a food truck. Hell couple years back the wife and I seriously considered buying a pizza place in small town Cowan TN, with living quarters upstairs. Several factors there why not.
One thing I learned over the course of my seven months off is that my hobbies, to which I include my cooking, are meant as a mind distracting hobby. I do beef jerky. I take old wood windows and insert sheet metal for magnetic boards or pain some wood and put in a clock mechanism, or chalkboard paint or... I've gotten into live endge furniture. Wine bottles cut to make wind chimes. etc, etc. I've always given them away to friends and family, but during my time off it became a (very small) revenue producing venture (see threezeroeights.com which I never really set up completely). The take away is that when they become work, not the distraction from work, they cease to be nearly as much fun.
If i were to do something like a food joint, it would be a dive. Basic burgers (done correctly), dogs, taco bar maybe, pizza, but nothing to elaborate and a couple pool tables, darts and a few beers. The most fun I have cooking is when the 'cool kids' come over and we all sit around hooting at each other while eating.