I will know in about 3 days whether or not one or more of three major bids will be awarded to me or a competitor. Each of these bids are for properties of 17 to 20 acres(of actual grass). Right now I have a 48" Exmark walkbehind and a 21" mower. I know my setup is not going to do the job. I am looking to purchase 2 new machines, but have a dilemma: each property wants 3-5 acres of grass collected due to its location. The rest can be mulched/discharged when cut. So.......do I purchase 2 z-riders with collection systems, or do I purchase(my original plan) a 3-wheeled rider or z-rider and an Exmark Navigator-style mower, or do I buy a 96" mower used on golf roughs and get a Navigator? All my current accounts are high-end residential save 4 commercial properties and I operate solo. I look forward to purchasing my dream rig. Thanks for your input.