
I do know someone (friend of my fathers) who has done pretty much what you are planning to do (ok some sliiiight differences)
He bought Spinaway Isle as a fairly knackered ex scottish trawler in the med, did her up with the aid of his teenage sons so that she was safe, and brought her home.
She then spent a fair while in Gloucester docks being converted and turned out a very classy ship, berthed about 8 people possibly more.
I cant remember much very useful though, but if you want me to find out more i can do (i think), as i was just a child at the time.
I know they had dogs and spent a fair amount of time away on the boat with the dogs and it worked pretty well for them. Not sure if its a craft that can be used singlehandedlyALL the time, but then most things are possible when you get into a routine, i never thought id be able to manage a 70ft narrowboat on my own and i can! (although locks are a bit hairy)
Em
ETA -- some of my details abotu Spinaway Isle miiiight be off, but out of curiosity i just googled her name and THIS IS HER...
http://www.planadive.co.uk/Ireland_Live/Resources/faithful.jpeg
Now a charter boat for diving, in scotland.
Em