Do the advantages of living on a narrowboat/canalboat in the summertime outweigh the disadvantages in winter?
A permanent berth is really required for 12 month living aboard and then it is really the same as living in a caravan except that you are on water. A permanent berth does mean a possibility of mains electricity as well although a wood burner or diesel heating will soon warm up the space rather than use electricity. The big advantage is being able to cruise the waterways when you want to and providing there are no restrictions due to works or the waters are frozen the winter time is a magical time for cruising.