dj;
That attachment for the mantis is a tiller, not an aerator. For $85.00, I rent a commercial aerator from my local rental outlet. This is for the whole day, and they have half day rates available as well. In that 8 hour time frame, I did a 3/4 acre lawn, drove 16 miles and did another 1/2 acre lawn, drove another 13 miles and did a site 75' X 550'. Maybe you and a neighbor can join forces and share the rental fee on one. I usually dethatch in the spring, then aerate and overseed, let the grass go through a couple of mowings, and then fertilize.