As an electrician, this wouldn’t fool me. Just like how a florist knows that these million flowers are “not for a wedding”. Lol. Nobody is running 240v, requesting a Nema 15-50 or 15-30 100’ from their house for anything else nowadays. Also, any electrician worth his or her salt would very much need to know what their job/scope is requested for.Here’s one thing you shouldn’t bring up; don’t tell them you are using the outlet for a Tesla.
It’s a great idea - but the whole “don’t tell them it’s for a Tesla or don’t tell them it’s for a wedding” is not necessary if you’re hiring a reputable professional. I’ve never “taxed” someone because they had a Tesla. It’s just another job, another invoice. Simple as that!
Don’t over think it too much. If you get the vibe that your electrician is going to upcharge because it’s a new Tesla, then you need to get another quote from a better person. There are honest, good ones out there..