So I am now looking for a timber cart and I remembered this old post. It doesn't look like there is one readily available in the US for purchase?
Rafael, how far have you gotten in making any? You are right, $500 does seem a little steep for guys who are always looking for the most frugal way... Maybe a better alternative is to come up with a free set of plans? In looking for cheap alternatives for building one, I'm thinking about using baby spare car tires. I've got a number of them that I use in my shop for rolling cars around durning restoration. You can pick them up relatively cheap in the bone yard, but I'm not sure how much load they can take. I'd have to fabricate a hub/axle from a car spindle....