@Frapo
I believe the 3 Mobile Connector will suit your circumstances especially as it is single phase.
Unless you are going on frequent long distance trips or you have charging available at work where you might need to carry the Mobile connector with you, I would just leave the mobile connector plugged in to the garage wall socket with power turned off when not in use. When you do need to take the mobile connector with you just put it in the car.
There is a benefit to a Wall connector - the tesla app records the energy use per session of the Wall connector but does not do it for the Mobile connector. Not sure if this is a feature that you want to have. If you do then go with the Wall Connector.
Overall I would get the Mobile Connector first, see what your charging routines are like before deciding on the Wall Connector.
Even if you decide to get the Wall Connector, I would still get the Mobile connector for portability charging.
I don't need to buy two devices.
This is correct. And easy enough to leave the Mobile Connector plugged into the garage socket with power turned off.
Easy enough to put the mobile connector into car for the usually infrequent long trip.
The idea that its easier to leave the Mobile Connector in the car on the off chance that an quick unplanned long trip is needed is like the 4WDs around the place with the orange
MaxTrax mounted to the roof racks - never know if the 4Wd needs to go off road at a moments notice