I just can't get over how expensive they are. I think I'd be looking for a cheaper solution.
For example, I bought a 102 quart (25.5 gallon) stainless steel crawfish pot for $212 (they are now $219). It came with a boil basket (not needed for brewing) and a lid. I could add a Brewmometer and a three piece 1/2 inch stainless valve and two full 1/2 inch weldable couplings for $60, plus another $50 for having a welder drill holes and weld the couplings for me. I personally don't like sight gauges so I wouldn't bother with that.
My total cost ends up being under $325 plus whatever I pay for shipping or tax. Let's say $350 and I end up with a 25 gallon brew pot instead of a 20 gallon Blichmann Boilermaker that costs $398. I can do 20 gallon batches in my pot that wouldn't be possible with the 20 gallon Boilermaker.
My crawfish pot is 1mm thick, which is closer to 19 gauge than the 1.27 mm thick 18 gauge Boilermaker, so the Boilermaker is slightly better. That's the one thing I don't like about all these big pots. They use thin metal. 14 gauge (2 mm) would be really nice, and 16 gauge (1.5 mm) would be adequate.
Consider the
142 quart Bayou Classic stock pot. It is 16 gauge 1.5mm thick metal. It is 35.5 gallon capacity. It costs $350. Spend another $110 as in the previous example to add thermometer and valve, compare your $460 cost with the $509 cost of a 30 gallon Boilermaker, which is still only an 18 gauge pot even at that size.