Hi Tel and welcome to the forum - its a great site for help and advice.
We are looking into rving too and have had some great advice off here. There are so few places in UK to look at MH of these sizes, we are off to the states thursday to look at some - there is a place in Oxford called Dudleys who have some units for sale, check there site http://www.dudleys-rv.com/classa/
and see if there is any of interest.
Also, dont forget to let our American friends know how your doing with fulltiming in UK with pictures and places of interest.
Have loads of fun and let us know how your getting on, I have a personal interest too
Happy trails Tel and family