A friend-of-a-friend lived on a narrowboat for a year while we were at university. It was all fairly straightforward, although maintenance cost more than he ex

A friend-of-a-friend lived on a narrowboat for a year while we were at university. It was all fairly straightforward, although maintenance cost more than he expected, and he was surprised to find he couldn't just moor it in central London — 'parking' is limited and restricted there. You'll find plenty of people have written about this, e.g. https://livingonanarrowboat.co.uk/ https://livingonanarrowboat.co.uk/. You could also search "narrowboat holidays" and see if you can hire a boat for 6 months. I don't think being non-UK will make any difference. You can visit the UK for up to 6 months as a tourist.