Do any of your vehicles support the installation of a Class I hitch? Some of the really small trailers are only like 300lbs and many cars are rated to tow 1000lbs.
Some boards, tie down straps and a wiring harness to connect to your vehicle and you would be set.
Maybe something like this?
http://www.harborfreight.com/870-lb-capacity-40-inch-x-49-inch-heavy-duty-utility-trailer-with-8-inch-wheels-and-tires-42708.html
Good idea, I actually had thought of that. I drive a Honda Fit and the dealer was very clear that if I towed anything it would void my warranty. The car just isn't rated to tow anything. It's not very powerful. But it's almost big enough to put a snowblower in it.
Funny thing is I did Tow things with my Miata at least my tires and equipment when I used to Auto-X it. 
"If you have more miles on your snow blower than your car, you live in New England." "If you can drive 75 mph through 2 feet of snow during a raging blizzard without flinching, you live in New England."
