If Thunderhill wanted to attract Model S owners, 50 amp plugs is a little light and a private Supercharger might not come for years. What would attract them now would be to install a bank of Clipper Creek CS-100s and ensure they have 240 Volts + to them, 250 would be ideal. No 208 Volt that sags down to 200 BS...
http://www.clippercreek.com/products.html
That would give 62 MPH of charging which is pretty darn quick.
I would start with two of them and provision up enough electrical to install 4-8 of them.