(US) Home charging: outside? Multiple?

I’m considering installing home charging (ok, I’m considering a Tesla so formulating my requirements for charging) so wanted to ask your experience for things that aren’t clear to me

the idea of multiple chargers appeals to me since there’s usually more than one car in my driveway. I like how the home charger has power sharing and I certainly don’t need concurrent max charging, but ……

— my panel is crowded. It’s unclear whether multiple chargers need to be on separate circuits or can share one? If can share, are there size requirements? One option is to put in a “big enough” circuit as the biggest expense but not worry about a second charger when I need it. But can they share a circuit? How big does it need to be? Or would I need a sub-panel in the garage? I don’t like all the extra connections for such a high draw circuit, but it would add flexibility

— anyone with experience having the charger outside? Would I regret it? I have a one car garage but have realistically never use it for a car. If I install the charger inside the garage, I’d generally snake the cable under the door

— for the universal charger, does it also have along cable or are there any placement limits? My driveway is one car wide by two long. If I park one in front of the other as usual, would I have any problems charging two cars at once? 24’ cable seems like it ought to be enough?