While they are extreme edge cases, such families exist. Tend to be general contractors, industrial farmers, agricultural buyers and such. People whose jobs take them all over the place. Having multiples in a family is no surprise. An amazing number of job types follow family lines - in fields as diverse as entertainment and the military.
You can always find edge cases, but they are exactly that, edge cases and they are irrelevant in terms of general adoption. ICE powered cars aren't going anywhere any time soon, and 400 or even 600A residential service exist, people that have those very niche cases have other options. The fact that there are a handful of people for which a given solution won't work doesn't mean that it isn't a viable solution.
In some countries the sale of new Petrol/Diesel Cars is due to be banned imminently. So alternatives would essentially be used vehicles.
The UK currently has about 15,000 public FAST chargers of which most are in london.
In many towns cars are parked nose-to-tail and when councils put in chargers they often only put one. I don't know if these are rapid/fast/slow chargers; it seems fast chargers are the most common installed so we may as well do the analysis on those
A 10-30 mile commute (20 to 60 miles daily) isn't uncommon.
If we assume a 200 mile range then our drivers will need to charge at least once per week.
A fast charger should charge a nissan leaf in about 6 hours. If we assume everyone is really nice & organised and charges & moves on immediately we can get 28 cars charged per week per charger or 420,000 per week for all the fast chargers currently installed.
There are currently 33 million cars in the uk.
Obviously not everyone will need to use a public charger. But a lot of people will not be able to use a private charger for a swathe of reasons; think flats/rentals (doa). I would need to spend some time to analyse the current public charger installation growth rate - but it's looking a bit woeful at first glance.
I don't believe the problem is impossible to solve. Since rapid chargers would be able to charge in 30 minutes or so. But these still need to be installed within easy access.
It's just interesting to try doing some ballpark sums on the problem