How much? Well lets say I bought all the materials (I had almost everthing except the lights, stock material, and paint) I would estimate the cost around $175 just for materials.

Sadly it was during I time where I was busier than usual so the rack took 2 weeks to complete. For the light mounts I just had some tabs of steel with pre drilled holes laying around. They just happened to be the perfect size for those 5" Pro Comps. Man now that you ask me... Without going out and measuring I think it is 5'6" Long x 4' Wide x 6" Tall. I can get you an exact measurement if you need.

Well those Yakima or Thule baskets you can buy are rated at 200LBs, but are considerably lighter. Mine weighs a whopping 80LBs! So far I have load tested it about 340LBs (260LBs in rack+80LBs of the rack) and the gutters or mounts did not bend a bit.