I'd do one of three things. Cause I could:
* Run 4-4-4 or 6-6-6 SER, whichever I could find cheaply enough. Doesn't need to be in conduit, have the utility shut power off to house for a few minutes (usually free) and drop the wire into the panel and connect it whatever breaker size you've elected. Lets say 60 amp. turn breaker off and power back up the house. Push cable up the wall, I assume you've a drill, punch through, and mount the wall charger. Commission.
* if wire cost was a hassle I'd run THHN, put it on PVC conduit (Cost and Hassle adds up) and repeat as above.
* Else I'd use a builders box on the wall that had the dryer plug. 30 amps is plenty for most folks. Use this and move on w/it
AB Switch
I'd still install the WC and keep the mobile connector in my car, but that's me.
Now consider this: I don't worry about power at all. I STILL don't screw around w/the mains, for it ain't worth dying over. Are you good enough for this stuff? Lotta guys in today's just weren't raised in a power tool/DIY kind of world. The wise man knows his limits and knows when to back off. Don't know you, not saying a thing, but I don't want to you get killed either.