You might beat his price by a few dollars if you try hard enough but you seem to be out of touch with the fact that aluminum isn't cheap - their prices aren't bad considering what you'd spend just on materials...figure ~$15 sq/ft for just the plate, then you still need angle to act as a truss and more angle for the drop-in frame, the stainless piano hinge will run you another $15...so you're looking at anywhere from ~ $50 + just in materials, let alone the equipment you'd need (bender, welder) & then the time piecing it all together to get everything right. The guy probably isn't making more than $20/hr on those hatches for skilled labor. Buy them from China through Cabelas or Basspro and you'll pay the same.