Well...it will have to be minimum 3-6 gauge cable. Don't think it can be done in 1 hour at all. Most area electricians charge $80-90 an hour at a minimum with a portal to portal rate. Then add the 14-50, breaker...I would say if his license is clear, it is a fair price. Never hire a Washington State contractor without checking current license information, Worker's Comp, Washington Department of Revenue, accompanying insurance, bond and past judgments. Here is the link...just type in Switch Electric and up pops the information.
https://secure.lni.wa.gov/verify/
The company has five "violations" totaling $8,250...all are "satisfied" which means they have ultimately complied or rectified infractions.
Compare them with Wyatt Electric in Granite Falls...just a few miles away. No complaints, infractions, etc. I just had them install two 17 kw propane generators and run an underground 100 amp service to a well pump house.
Bottom line: NEVER LISTEN TO ANYONE WHO SAYS OR ADVERTIZES THAT THEY ARE "LICENSED BONDED AND INSURED". Just check them out on line. In fact it is a $250 fine for using that phrase on any form of advertising according to RCW 18.010 because "the law requires that you be". So any advertisement can only list the contractor license number which you can check. Admittedly, the Dept of Labor and Industries does not vigorously enforce this, but many a handyman has said it because he had a business license and insurance on his vehicle.... I am not exaggerating. 21 years ago the Bellevue office of L&I did a "sting" on a single category and found about 25% did not have registration and accompanying insurance and bonding. The department manager told staff to back off as it was overwhelming them. This is an example of someone not allowing staff to do their job. Hope this all helps.
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Quite frankly as I sit here, I have been a Washington State contractor since 1979, completed over 37,000 jobs and never had an infraction. I am questioning the vetting system the local Tesla office is either doing or not doing. We verify, interview and check all companies which operate as subs for us. Switch would not make it to first base. Just to clarify...I am not an electrical contractor or looking for business nor am I soliciting directly or indirectly for Wyatt!!!