Firstly, unless you are prepared to work around 16 hours a day and divorce your partner, I really wouldn't recommend this trade.
I live in Great Yarmouth and there are loads of B&Bs for sale and lots of failing businesses. I also work in the commercial finance industry and know a lot of these do not run at much of a profit.
If you are really, really keen on the idea, post back and I will give you some advise (what part of the country are you looking at), but my first thoughts are: Don't do it!