Bike Trailers!!

Airfare, wow, so expensive! I'm a lot more adventurous than t hat, so I'm thinking back to what I dreamed before we went to Bolivia the first time - riding a bike there. With a six year old, and wanting to take stuff, I'm definitely going to need a trailer, and with a child, well, sleeping outside isn't safe enough for my lil guy. We'd need something safer than just a sleeping bag/pallet combo.
I started looking up bike trailers, but they are all tiny compared to what we need. What's the point of taking a trailer if it can only carry less than what I'd've been able to put on the plane? Then I found so many different ones, mainly on Youtube, and they are so cool, now I don't know which one! I'm thinking my own design would be a trailer 2/3 of the width of our smaller tent, with a pop over shelf, so the whole tent would fit on it, and this would be big enough for all our stuff.

Bushtrekka on Amazon, but really pricey!

He explains quite a bit, but I'm still wanting one bigger.

This one is really sweet! When you click on the video, it's going to ask you to watch it at YouTube, because embedding's been disabled.

I'm thinking since MrBaby wants to bring his bikes, that I might be able to use their wheels, so now I am debating on a two-wheel trailer or a four-wheel trailer. I'm looking at the physics of it, butt here's not much online so far.
If he can pull 920 pounds a few miles, I should be able to pull less than half that, or at least I would think.

I don't want three trailers, though, either. One should do it. Besides, his are made of PVC pipes, and most of the trailers don't even have bottoms!