Until I get a trailer next summer I made a couple poor man dollies for around 100.00 US. They actually work pretty slick. Here's a picture and youtube video bringing the boat out of the water. I guess I'm pushing around about 450 pounds (including dollies). Everything hauls nicely packed up in a 5'x8' utility trailer.
P8130025.AVI - YouTube
And just for giggles I included another video of me screaming by the Split Rock Lighthouse Lake Superior.
P8120010.AVI - YouTube