I'm a long way from doing this [three cats and a mother in law] but often see posts asking what kind of costs are involved per day. Usual answer is, reasonably enough based on string length, but an excellent article in the free mag 'Motorhome and Campervan' caught my eye. This is a reproduction of a blog piece and is available online at http://www.europebycamper.com/2012/03/touring-europe-for-year-what-does-it.html It gives the most exhaustive cost breakdown anyone could ask for! Bottom line for the couple involved was £28 a day - will be a different string length for others, but the detail given makes it easy for you to do your own sums. Good luck and I wish I was with you!