Something to haul all this stuff

Another project that I'm hoping to have done in a couple weeks. Ya, I know. At a lot of the events we go to, we have to park an annoyingly far distance away. Well annoyingly far away when you have to haul a couple of canvas tents, bunches of weapons, armour, and furniture. One thing I've been wanting for years is a hand cart to haul some of our boxes, furniture, tupperware in the off hours, etc.

I know I don't have the time right now (or the skill...yet) to make a fully period constructed cart. So, I'm planning on a simplified and pre-17th century cart inspired by these pictures:




I know there will be some modern concessions right off the bat. First off, dimensional lumber. Secondly solid plank wheels. Eventually I'd like nice period ones with spokes, but for now I'll deal with solid ones (and I already have them). After looking at designs and what's possible in the time I have, I'm looking to do a 3 x 5 bed with rails. Right now I'm trying to figure out the axle. The wheels I have available have a 3 inch hole for an axle and finding a 3 inch diameter wooden axle in 2 weeks promises to be difficult and expensive. Once I figure that out construction can begin.