This is something we have been contemplating for a while now.
On plus to a motor home is that because it is classed as a motor vehicle you are less likely to get bothered by the law when stopping overnight in a lay-by.
Do it for a couple of days in a caravan and you'll get reported as a pike'y. (I can say that as my better half's family have been part of the sceene).
Just outside our town at a CL there is a chap living in his tourer and fair play to him. But he's been on the same site since May last year. Now this raises another question, how on earth can one keep finding sites every 28 days?
Finding seasonal work on a touring park is one way of guaranteeing 9 months permanent pitch and usually if you've been a good worker your invited back next year. So that does only leave three months of pottering round.
Having spoken to folk doing this the word is. You won't make stacks of money at it, but you can afford to live.
Doing my math. On most sites as a couple you get about 4-500 pounds a week coming in for 9 months of rent, gas,electric,water and council tax free. So a loaf of bread, beans, milk, tea. coffee, a square meal at night for two ain't exactly going to break the bank! So a sensible kitty for winter camping should be left over. After all the chap I spoke to fires up his RV and buggers off to Spain for 10 weeks, and that can't be a cheap deal.
My last comment might raise a few eyebrows.
I say live for today and sod tomorrow, if we get too ill to carry on then let the council put us up or down as the case may be. After all I for one, and I'm not the only one, feel fed up with paying all the taxes and getting sod all in return.
Steve.