Thank you very much for the responses.
I don’t have a drive way or a way to get the cord to my car without it going across that sidewalk.
If can feed a cord under the sidewalk somehow then great but the other side is all road so I’m not sure how that will work or if I have permission.
Some suggested I build a permanent box. How can I do that and where would it go?
You would likely have to have a pedestal professionally installed. It would need conduit laid in the ground with cable run through it and up through a concrete foundation with the pedestal mounted on top and the wall charger mounted on that. Or a NEMA 14-50 outlet - that would be far more cost effective since it appears you're using that plug type already.
You might be able to go simple and just have a 4x4 post with one of these RV weatherproof 50 amp outlets on it.
Midwest Electric Products 50 Amp Temporary RV Power Outlet U054P - The Home Depot
The Temporary RV Power Outlet is factory-assembled and factory-tested. It comes to the construction job site ready to use with no need to assemble individual parts, saving installation time. The single,
www.homedepot.com
But again, that cable has to be buried under the sidewalk.