What I did was I initially installed (self installed) a 14-50 in my garage with 6 gauge wire, and used the UMC that came with my S. I later ordered an "HPWC" (High power wall connector), name later changed to just "Wall Connector." At the time, the HPWC was backordered and took months to get. Rather than hard wire the Wall Connector, I simply made up a 6 gauge pigtail with a 14-50 plug on it, and plugged that in to my 14-50 outlet. The Wall Connector is configurable, and I programmed it for 40 amps maximum, and took off to the races. 40 amps is more than enough for my usage pattern.
The electrical work involved is relatively simple and well within the range of home DIYers. But if you are not used to opening the electrical panel in your home or are fearful of all things electrical (TBH, that is a feature), you probably should hire an electrician to do it for you.