Everyone is having 14-50's installed and prices seem to vary allot. My electrician asked me to provide the outlet so as to ensure a good price. Cheapest I have found so far is the Cooper Cooper Wiring 5754N - Buy Now | Westway Electric Supply $59.44 after tax and shipping. For a little more I can prime the hubbell https://www.amazon.com/Hubbell-Wiring-Systems-HBL9450A-Specification/dp/B00IPBMUKY/ref=sr_1_3?ie=UTF8&qid=1532722760&sr=8-3&keywords=cooper+5754n $79.98 Is the Hubbell better than the Cooper? Also off topic, I asked the electrician about running 100feet 4awg instead 6awg, he said it would be an extra $150. Would this be a good idea in case I want to install the Tesla Wall Connector later?