I am bidding on a job that includes doing the aerating on 29,000 sq. ft. of turf. The only aeration job I have done to date is one small yard with a rented machine. I really don't know how to price this size job. The property is level,with few obstructions, only 16 small trees scattered across it. Owner will flag sprinklers. I am going to purchase a walkbehind aerator of some type for next season, so will be using it on this job. Any pricing suggestions will be greatly appreciated. Thanks.