In case anyone is interested, I got a quote from Wenesco on this model. Here it is:
Wenesco round hot plate model HP18S16: Plate includes an 18” inch round steel plate, able to support up to 1000 lbs. Temperature controlled with an analog high thermostat (AH) accuracy: 3% of set point. Operates on 240 Volts. Power: 6300 Watts. (1PH or 3Ph).
Price: $1685.00 USD
As you guys suspected, the price is pretty ridiculouse, but this would be an awesome heat source. No fumes, no messing around with installing an element in the kettles. 6300 Watts would heat 10 gallons to boiling in about 36 minutes.