It seems a high quality aluminum utility trailer costs between $2500 to $3000 and steel $1500 to $2100 depending on size. If you spend $1000 to build a box structure tall enough to stand in 12' x 6' that puts costs not including your labor about in line with a poorly built cargo trailer. Tnttt answers all building questions on it's forum. I built mine with a Ryobi drill and circle saw in the middle of the desert. I can not understand why more people with little money and lots of time don't see this as the way to get on the road, especially if you need a little more room than a van. Garrettwolf you are doing great, can not wait till you make your next one out of foam.