Why not make small bale hay, find a local farmer will prob charge you £9/10 per acre to mow, the same to ted it and row it up and 40/50 pence per bale to bale it, or some charge a flat rate to do it all of £1.00 to £1.50 per bale to do the whole lot. Cheaper than paying £3.00 plus for it, and if you dont need it all you have a cash crop you can sell, small bales are getting harder to find every year.
Firstly you topper is no good for the job, and turning an acre of hay twice a day for four plus days is a lot of work, the first day is exciting, the second day so so and the rest just plain knackering and all your friends will suddenly dissapear when asked to help!! Nice rectangular bales, easy to stack/store and to move around when needed.
Good luck...