I found a 10 gallon SS pot on Home Depot website for $100. Nice heavy gauge SS, with handles and lid and even a steaming basket (if you want to steam crabs, lobsters, shrimb to enojy with your homebrew). I bought the weldless bulkhead and ball valve with dip tube kit from a vendor I found on here. Voila, a great brew kettle for $135. I have used it with the propane burner I bought at the same time from Home Depot website. I can get 7 gallons wort boiling in 15 minutes.
Look for Bayou Classic 44 qt SS stock pot. The burner is Bayou classic square high pressure propane burner.