5 homes is likely rare, but I don't think 2 is extremely uncommon. Like vacation home where family might spend summer or working at different city than where family and coming home for weekends. In Finland over 10% of people have a cabin and in average they spend 79 days of the year there (https://suomenkuvalehti.fi/kotimaa/yli-puoli-miljoonaa-kesam...) though I'm not sure how common it's to have electricity these days.