My sister and her husband have lived on their narrowboat for more than 20 years. They sold up their house in their 40's and moved onto their boat after realising that a lot of his family were dying very young, so decided to enjoy life while they could. This forced their son to finally leave home, although they did make it easier for him by providing a deposit to buy a flat. They sold and got rid of just about everything, as there really isn't room on a boat for excess clutter, and have honestly loved every moment. Initially they went touring every summer, but when they felt they'd got to know the canal like the back of their hands, they didn't feel the need to move about so much, so found a permanent mooring, and even have a little garden on the side of the canal, and an allotment locally, so all the benefits of canal living, but also those of having a home on land too. He's quite a few years older than her though, so I don't know whether when something happens to him, she'll still continue on the boat, or not, but as long as she doesn't want to cruise, she should be OK as she is.