Seems like a good deal to me but depends on your use case. Unless you are driving the car hard on a near constant basis and find yourself in a depleted state every day and need frequent charges at home that can’t be met with the lower rate overnight charge, you will get decent hardware with a lower cost install paid by your utility. Plus, if you find your use case changes in the future that demands a higher amperage unit, you could replace it. Just have the wiring gauge installed to support a 60A circuit to provide some future proofing. You may get some pushback from the utility for the higher installation costs, but I would pay the delta as the wiring run will be a significant cost component of the install.
it's fine - and you can have the Porsche included unit as a backup - have the electrician installed wire gauge rated for at least 60 amps - and a Hubble NEMA 6-50/14-50 outlet and you'll be golden - my preference these days is for the 6-50 plug since that saves a bit on wire cost and and avoid the unused 4th wire (neutral) - NEMA 14-50 to 6-50 adapters are cheap/effective/safe/affordable - so at the end of the day it honestly doesn't matter which plug you get and the 6-50 is "cleaner" in my opinion and more EV focused.
