Wow, 11 acres!!! That would take forever with 36" aerator!
I would buy a nice Rainbird, BillyGoat, or some other tow behind aerator that would hook up to a tractor. You are looking at over $1500.00 but it would last you a very long time.
The $4000.00 plus aerator is the one that's My Post Picture (sitting on the sidewalk). It's a Lawn Solution Dual Hyrdo Walk behind (but you can hook up a sulkey-so you can ride standing up-if you want).
Lawn Solution got bought out by Toro/ExMark. They are coming out with the same machine that's My Picture....and Toro was going to have them in July 2012.
Well that date has come and gone. So now Toro might have them ready sometime this Fall....maybe????
The Dual Hydro is a great machine and it can do everything the rider can, for less money....just takes you longer since it's only 24" wide when it aerates...compared to 30" for the Riding Aerator.
You could almost buy two dual hydro aerators for the price of one riding aerator....that is if and when Toro starts selling the dual hydros.
Hope this helps a bit ed2hess. Best bet, call your local Toro or ExMark dealer and ask them when the dual hydro aerators are coming out....and you would like to demo one.
2013 Ford F450 Super Duty Truck
2010 Exmark Lazer Z 60" deck
2012 ExMark 30" Riding Aerator
2011 John Deere Pro Gator 2020a
2011 Lawn Solution Dual Hyrdo Aerator 24"
2011 Echo Handheld (trimmers to power pruners)
2007 Big Tex 4ft metal high side 7' x 12' Trailer
2012 PJ 7' x 16' Dump Trailer
2014 Vintage 8.5' x 24' Enclosed Trailer
2012 Ecolawn Applicator model 200 Compost Spreader