I can see what you're saying, but having driven in a van from nyc to ottawa, it is neither easy, nor cheap. I think it worked out around $150 per person, and that's with 8 people in the van, splitting costs. In this example we had customs as we were going to canada.
you should fill up a van of people and take the channel tunnel. it's arguably as easy.
I'll be moving back to new york in three weeks, so trying to help organise a european body from a different continent seems a little odd.