What part of it is "unthinkably extravagant"? Having a vacation home isn't very uncommon, 4 weeks of vacation in a year isn't uncommon. You don't need to be stupidly rich to be in the situation I described, you just need to 1) have had enough spare money or luck ant some point to end up with a vacation home (inherited or otherwise), 2) not have severe enough financial trouble in the present to sell it, and 3) value it enough to prioritize it over the benefits of selling it.
I'm in Norway, so that probably skews my perception a bit. I'd say it's almost more common than not to have some vacation home in the family, and 4 weeks of paid holiday is the legally mandated minimum.
