acadapter
Member
how did the electrician run the wire in the basement? was it run up the ceiling? do you have any pics I could see of how the wire is running? I'm going to get a couple quotes but likely use the Tesla recommended one.
Can you tell what way the joists/beams are running that support the first floor? If they run perpendicular, fishing a 50A circuit cable through your ceiling inexpensively will be far more unlikely. In our house for example they run perpendicular to the width of the house meaning a run of a new cable inside is extremely difficult. Actually, without a drywall cut the entire distance, it would not be possible.
If you have any unfinished area of your basement, check the beams there.
Expect phrases like: "Until I start cutting I won't know for sure."
I actually have what @wiredprairie is referencing but I have a bulkhead that runs from one side of the house to the other. It's where my networking CAT5/6 cables are run along with other miscellaneous cables. I will take some pictures this evening for you to see.