Mowing a lawn with a zero turn mower is almost as much fun as you can have on a lawn mower. However, even the residential grade zero turns will cost twice as much as a residential tractor mower. You don't have a large lawn, so you don't need to get crazy by going for a commercial ztr with a 60" deck. We can help you, but we need a little more info. What is your budget, and what dealers do you have in your area? Even with a zero turn you will have to do some trimming, unless you spray round up around the obstacles you have to mow around. If you are having a problem with scalping look for mowers with anti scalping wheels mounted on the front, and back of the deck.