How do these people live/survive? Do they have income coming in from somewhere or do their families support them? I know a few people that would like to stay in

How do these people live/survive? Do they have income coming in from somewhere or do their families support them? I know a few people that would like to stay inside and do stuff they really like (play games, read books, draw, write...) but they don’t have the means to do it. Another issue has to do with the actual physical/materialistic reality. Don’t they need to buy food, put the garbage out, visit the doctor, buy stuff...how is it possible for someone to stay months or years inside the house?