The newest, (and only remaining), of the LHS' in my town to give it a go is a HobbyTown USA store. They've been here for less than 2 years and have already been burglarized 4 times. Recently a guy was walking to the counter like he was giong to buy an RC car, but bolted out the door at the last minute to a waiting car. When their lease is up at the end of 5 years the owners will probably try to sell the business. Like Hobby Lobby, HobbyTown USA is a franchise that I think cost them $250K just to get started.
It's a noble endeavor, my young friend, one that I have also considered. Maybe if you strap a minigun to your side you can at least ward off the robbers!