Let's look at the advantages of RVing in Europe...
It's a car, hotel, kitchen, and restroom all in one. It can be parked at an RV park for about $15-$20 USD per night which allows you to utilize the park's electricity and other facilities. This is SO much cheaper than a hotel (or even a village room) and allows you to cook your own meals - which is another big money saver.
Worried about where to stay for the night? You don't have to be if you have an RV.
Want to visit multiple places and need to do it in a timely manner? Don't want to rely on public transportation? Want to just "get up and go?" An RV may be the answer.
Where to Get It
The Netherlands-based company BW Campers is an excellent place to start. For longer trips, buying is the way to go - especially since many of BW's partners offer guaranteed buy back programs when you're finished using the RV. They also take care of all the hassles such as licensing and insurance for you. All you have to do is pick up the RV. Visit their website at www.bwcampers.com . There are other companies, too, I'm sure. I'm just more familiar with BW. Look for others if you want.
If you live in the US, you also have the option to ship your RV over to Europe. If you already own an RV, this is usually the cheaper way to go. However, you have to deal with insurance and licensing issues on your own. Not fun, but if you do some research it's no big deal.
There are also various places you can rent the RV from in Europe, but this is more expensive if you plan to travel for more than a month or two. Check out all your options before you decide, though.
Real Life Inspiration
I first got the European RVing idea from the lovely family behind the blog "SoulTravelers3." I absolutely cannot believe how resourceful and efficient they are. Can you believe this family of 3 travels in Europe for only $25,000 USD per YEAR?!? I still can't get over it... This proves how affordable Europe can be if you know how to be tactful and creative. You can view their blog by clicking under the heading "My Blog List" on the left side of the screen. It's worth reading!!!!
"And that's the wonderful thing about family travel: it provides you with experiences that will remain locked forever in the scar tissue of your mind." -Dave Barry