At $9+ grand I would currently have a hard time justifying that expense. I fit aeration jobs in around my regular maintenance accounts, and 90% of them get done in a couple month in the spring and a couple months in the fall. The rest of the time the aerator sits in the shop. I can definitely see how that thing would be great for big lawns but it seems to me like you would still need a smaller aerator in some spots. What often seems to happen in those cases is the amount of time you save with the wider swath is quickly lost when you are having to switch between machines. Also, from watching a couple YouTube videos it seems like you can only do the most gradual turns with the tines in the ground. With my old Bluebird I can make a corner with about a 3' radius without tearing up the lawn. I spent $1900 on my Bluebird 12 years ago and it still runs great. Only a couple carb rebuilds, and the rest is just normal maintenance. It paid for itself in the first 3-4 weeks I had it. (I have long considered it the best business purchase I have ever made.) I guess it all depends on what kind of lawns you are doing and how many of them you have. I'm sure for a larger company with hundreds of accounts this thing would make complete sense. It looks like a VERY COOL machine if you can keep it busy enough.
Actually I've done anywhere from 7k sq ft lawns to multi acre properties. Turning radius. Zero. Lift the tines which takes a second. make a zero turn or a k turn. Push the button and the tines are back in the ground. Prior to buying my Exmark, I really didn't promote aeration simply because I hated doing it. This past fall, I sold the heck out of it. Yes, I do still have my Turnaer 6, for gated backyards with gates smaller than 4 ft. I could mow grass with a 21" mower or a 48" or 60" ZTR. Yeah, the ZTR costs a TON more, but it is more PRODUCTIVE allowing me to do MORE work in LESS time or as I like to think of it, MORE work in the SAME AMOUNT of time which results in MORE MONEY.