We made the decision to sell up and buy a narrowboat over 5 years ago, we haven't looked back since! We chose to be cont. cruisers as we didn't like the idea of being on a mooring for any length of time and wanted to cruise the network as much as possible. We still cont.cruise in the winter months, choosing the biggest area available during the stoppage period to enable us to do this.
As far as docs go, I've had my fair share of probs, broke my wrist in 2007 on the Kennet & Avon, had to call 999, went to local hospital and stayed in that area until i was given the all clear. Then in 2008 whilst on the Middlewich Arm/Shropshire Union I had a lump appear on my neck which had to be removed. I went to the local docs and they referred me to the local hospital where i had scans etc and then finally an op all with out any probs with living on a boat.
I need tabs quite often and because we are cont cruisers I'm always in a different place each time i need a new prescription. All i do is go to the docs and get an appointment as a Temporary Patient, you have to fill in a form which details your home address. As we don't have a home address I use my parents address as this is where all our correspondence goes. Have not come across one surgery where they do not allow you to be seen. If the docs is near the canal they are often used to canal people doing the same.
We also use Tesco/Asda home delivery when we can find a suitable spot for them to get the van to, ie : road bridge with a lay by etc. This is a godsend as saves lugging all the heavy stuff back on the bus and down the tow path especially as we don't have a car.
Living aboard is the best and you'll love it, there's always a way round things! Wouldn't go back to dry land for all the £ in the world now
Hope this helps.