Surprised how expensive it is is it's around $400.
I guess most of the cost for these custom kettles is the labour cost for disassembly, assembly, packaging, post, etc.
I was quoted just £24 ($29) each to coat 45 Gallon drums. Maybe that's why the enamelling company I dealt with went out of business!
Their core business was enamel bakeware. The track was continually running at near capacity. Very cheap to produce. I came away with a pile of free baking trays.
Materials are very cheap. Running the furnace will be expensive, especially with todays energy prices but that's why they need the high volume goods to keep it fired up.