I bet you could sell a couple of the cages you have now on Craigslist or reptile show. Then start over with PVC. I also think in this area you could make a few bucks building these cages.
I am about 45mins north of Pittsburgh. Just look around at the prices for the size cages you just built. Just keep the operation small and custom. Have it just for pick up etc.
Just my opinion that with heavy large snake in PVC I think bonding and screwing is a good idea. TGR even puts a cuts out a center divider in the center of the large 6ft cages for more strength. Interesting design that I seen and liked.
Anyway very nice looking set ups.