DIY Hiking trailer for less than 70 €/$

For couple of weeks in a year, the partially frozen or flooding river makes it impossible to use a boat, and there is not enough snow to haul heavy stuff to our hunting cabin using a sledge. Being well prepared in advance, those few weeks usually are not a problem at all, but it would still be nice to be able move things by some easier way than by making several round trips dragging a fully loaded backpack. Therefore, I decided to build a cheap walking trailer, not weighing more than 10 kg (22 lbs), hopefully capable of handling at least 50 kg (about 110 pounds) load on an uneven terrain. Read more at http://slowfoodsurvivalist.com/?p=208