Hi, I have 1 acre of St. Augustine grass to cut each week. Do you suppose a "homeowner" zero turn mower is sufficient, or would you spend the extra $$ for a commercial? Dealers in the area have Toro, Gravely, Snapper, John Deere. I know nothing about either. They recommended the following: Gravely ZT 2352 (52", 23 HP Kohler) $4250 Snapper ZT20500BV (50", 20 HP Brigss and Stratton) $4699 John Deere Z-Trak 717 for $5,995 (44", 19 HP Kawasaki) which is commercial grade. Thanks!