Before I start, I'm going to state that I am aware that the more btu's a burner has the faster it will boil water!
Now, what is the minimum amount of btu's it will take to boil 7.5 gallons of wort? I ask because I am thinking of buying a turkey fryer kit off of craigslist for $40 that has 35,000 btu's. Is this enough or would it be in my best interest to go with a unit that has 185,000 btu's. I realize the HUGE difference in heating abitlity but would it be worth the extra $30?