I'm not suggesting fraud is rampant, but I suspect some electricians that haven't previously done EVSE installs over estimate to cover their bases.
Try getting a quote for a "dryer" outlet - a NEMA 14-30R, which requires a 30A breaker. You can safely charge up to 24A on that circuit, which is really close to full rate anyways. Don't say anything about charging an EV, just tell them you want to put a new dryer in your garage.
Have you already purchased an EVSE? If not, you'll want to get one with a 14-30P to match the dryer outlet. Make sure it has selectable amperage settings, so you can choose 24A.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV