You have to factor in the cost of the materials (and shipping for them) even if you just buy the plans. If you have an extensive stock pile to pick from, then the shipping for the materials is going to seem exorbitant. If you have to order materials from Speedy Metals or Online Metals or one of their ilk, shipping costs for the materials can quickly eat up any savings over having the kit shipped. Local metal dealers are an option if you have them, but may have minimum buy quantities or cutting fees that quickly eat up any savings. I have a 100 mile drive to the nearest metal dealer, so fuel costs will run at a minimum ~$40. I've paid more in shipping than for the item more times than I can count. No matter how you aquire the materials, there will be a cost.