I paid $550 in Frisco for nema 14-50 with city permit included. Used Hubbell commercial grade outlet, and #6 wire incase I ever want to upgrade the nema to the Tesla Wall Connector. Just install a gfci breaker for city inspection and then swap it to a normal breaker yourself or tell the electrician to do it after city inspector leaves. My outlet was within 2 feet of breaker box so that helped keep costs down. For my daily commute of less than 100 miles the nema charging is more than adequate at 8kwh. If you do install a TWC and decide to sell your house, in Texas just like anything else permanently wall mounted, it will be included in your home sale unless you explicitly ask your broker to exclude it on the listing. Unless you are driving more than 150miles a day the extra cost of TWC is not worth it.