A new 16' x 76" angle top utility with 2 3500# axles and used tires can be had for $750. The pipe top are a little more but all the ones I found use sprinkler pipe, which is actually cheaper than the angle iron. The pipe top 16' x 83" is about $950. Add $150-200 for new tires, and about $150 per axle for brakes if you want. Pick up an equipment trader, plenty for sale in there.