As much as Tesla would protest about this now, I foresee that eventually they are going to have some franchise dealers, especially when a high volume (Model 3) appears. I know they are afraid that today's dealers would not give EVs a fair representation, that will change once there is a large public demand.
Mercedes-Benz had a problem at one time, where dealers handling multiple brands didn't give the Mercedes a fair shake. At that time, Mercedes started a rule that any Mercedes dealership had to be a separate Mercedes-only business, i.e., not mixed in with Buick, Lincoln, etc., as used to be the case. At the time, there was some concern that the Mercedes M-Class (new at that time) would not be sold in Alabama (state where it is built) because there were no exclusive Mercedes dealers. However, the dealers got with the program and built them.
There is the question of what kind of economic incentive there is for a businessperson to invest in a Tesla dealership if their business model is to make much of their profit from service- and Teslas require minimal service. It's just a question of structuring the deal right...moreover, as Tesla vehicles age, there will still be things for the dealer to fix, no matter how well the car is built. Think about a 12 year old Model S - well cared for and still beautiful - it may need brakes, even a new master cylinder; air suspensions require all kinds of repairs; the coolant for the 85kwh battery has to be changed at least every 10 years, I expect, as does brake fluid; bearings wear our, springs break, window regulators and power locks break, as do seat adjustment motors, etc etc. It is not immortal, it is a machine. So eventually (it could be 10 years), Tesla dealers may be coming to your neighborhood. Tesla can blunt some of the agony of customers working with dealers by setting non-negotiable prices (like Saturn did), and still comply with franchise laws (not that I think these laws are needed, but they exist).