I towed this trailer and boat with by Dodge Carvan 4 cylinder before I got my truck. No problems, you could tow it with an economy car, the whole rig is pretty light.
I got this trailer new for $300 at Harbor Freight. It comes by UPS in 3 boxes as a kit and you assemble it. Let me know if you need more info on it. I hae some pictures in my gallery of me assembling it. Search on boat trailer kits and you'll find more manufactures, too.

http://www.calfishing.com/gallery/Boat-project/z8_lopez_launch