I have been using a 700sq in pitboss for a few years and am wanting to upgrade. I'm looking at the AustinXL that walmart sells. It's a 1000sq in unit. I am wondering if there is a noticeable difference in pellet usage between the different size models. If I grill 50 times a year I may only need the added capacity 3 or 4 times but it would be nice for those times. It seems to me it will take more pellets to heat a larger area but just how many more? Anyone have any thoughts or experience on this?