I have had a read and I can't find one comment about something very important! Maintenance of the van! One breakdown can eat up a couple of months living expenses. There was a guy posted somewhere on Facebook (I think) who is terminally ill and doing his last trip and living full time in his van. He gave up his rented house and now has no base, he has no family and uses a friends address for legal stuff.
His gearbox has broken! It has caused two problems. The first is trying to find the money for the repairs. It is an old Talbot van and he is having a problem trying to find a gearbox. Second, he has to get the van to a repair garage, while there, he can't live in it. So he has to find expensive, short term accommodation.
If he can find a box, it will take a couple of days to drag it in the workshop, fit the gearbox and clutch assembly and finish off. BUT.. It may take weeks to find a box, or just as long to have his box rebuilt. It has been estimated that it could cost up to £4K by the time he has finished, including accommodation. Then of course, there is the annual MOT. Great if it passes, but if it needs repairs? Spares that have to be ordered?
And this is on top of the medical side. It is OK when fit, but break a leg or have some kind of accident and be laid up, it will be difficult. It may be OK, but I see full timing as a younger mans game, I wouldn't be without my bricks and mortar!