Why do you recommend the wall Connecter opposed to the NEMA? Has anyone ever run into a problem where their house could not accommodate a charger? My house is very old.
I can't speak for
@user212_elijah, who recommended the Wall Connector over an outlet and the Mobile Connector that comes with the car, but I agree with that recommendation, for a couple of reasons. First, the Wall Connector carries a NEMA 3R enclosure rating, meaning that it's safe to install outdoors in rain and snow; it should stand up to that weather without being damaged or creating a safety hazard. The Mobile Connector has no such rating. Although some people have used them outdoors for extended periods without problems, others have reported failures when they're used in this way.
Second, I've seen claims that it's not safe to use a NEMA 14-50 (or similar) outlet outdoors. I'm not an electrician, though, and I'm not familiar with the relevant codes, so I don't know if this is true, over-cautious, or what. Certainly there are plenty of such installations at camp grounds and even at peoples' homes, but I, for one, would err on the side of safety. If you
must go this route, I'd recommend a NEMA 3R or NEMA 4 enclosure for
both the NEMA 14-50 outlet
and the Mobile Connector. That approach should at least keep the water off the equipment when it's not in use.
One more point: The Mobile Connector tops out at 40A (for the Gen1, which you'd probably get with a 2017 Model X) or 32A (which you'd get with a Model 3, a newer S/X, or if the seller has replaced the Gen1 with a Gen2). The Wall Connector, OTOH, tops out at higher charge rates -- up to 80A, IIRC, although few Teslas can charge at that speed. Chances are yours would top out at 48A, but you may want to research that to be sure. (You'd need wiring and a circuit breaker to match the top charging speed, of course.) The difference between 48A and 40A or even 32A isn't all that huge, and probably isn't worth the $500 cost of the Wall Connector by itself, but it's worth mentioning.
Overall, I suggest you contact some local electricians. Get at least two estimates for the work, and ask them about local codes regarding installing a NEMA 14-50 outside, if you want to go that route. Although lots of people on this forum have experience doing electrical work, there's no substitute for an in-person inspection by a qualified professional.