You would need a big lawn for something that size. We used to get some big Atco mowers in from the local council which had the trailed seat roller, great for mower races also................................. Allen scythe tyres were ripped apart more than once during "races", another accident occurred when a large rotovator was run out the workshop and the soil tillers cut a 240v extension lead which was laid across the floor, clean in half with a big crack and flash.There was also a stonking great Dennis mower with seat trailer, would have dearly loved that but impractical, would have cut you lawn in just two passes!!! More useful at Trent Bridge, doubt it fetched a sight either.
Tony.