On a steep hill, yes you can walk behind it....but most of the times I will ride down something a little bit steep. If it's too steep....I have my walk behind aerator (RIP: Lawn Solutions dual hydro).
The LS dual hydro might be a collector's item....I'm not sure if they ever got 5dual hydro walk behinds made? But I got one by calling once a week to check how they we're coming along.
Aeration accounts can very....and since it's been so dry here... I am waiting for some rain before I place my ad in the paper.
For me to justify the cost.... it makes the job so much easier and quicker... I can do other work that I would normal be stuck aerating the old way.
As long as you don't live in Northern Illinois....it's a great machine. If you live up here....it's too much money and you don't want one....lol. Since I have 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