I am preparing to build a Passagemaker dinghy in the Feb 25-29 class in Annapolis, and have been looking for a solution to lift the ~90 lb boat onto the roof of my minivan by myself.  Inno and Rhino carriers look nice, but way too much $$ for my budget. 

I found what looks like a great solution for building not only a car top carrier and loader, but also a nifty strap on dolly as well.  Check it out here:  http://www.pbase.com/onceagain/cartopper

This is the route I'm planning to go.  Will come back and post pics and updates for those that are interested.

-Bruce