If I had a decent amount of land, I'd definitely build my own go cart track.
I wish that too.
Honestly though, I'm fortunate to have 2 tracks near by. It's not the best but it's cheaper than building my own.
For a dirt track, you can get by with a skid steer, pavement roller and 1/4 - 1/2 acre lot. Used tires and framing optional.
If you want a bridge over a figure eight, that will be a little more engineering
Schumacher, arguably THE greatest driver ever was raised on his family's kart track. senna, the other greatest driver ever said "it was pure racing."
Except that Schummy admits that Senna was the greatest driver ever...
That's false modesty, I assume.
I'd eat my shorts if Schumacher didn't truly believe he'd beat anyone else in a race where everyone was at their prime.
He actually broke down and cried during a post race interview many years after Senna's death when asked about beating a record held by Senna. He may have some false modesty but I think most drivers who knew Senna and even many who never met him hold him in the highest regard.
The cars he raced in and the era were some of the most powerful ever seen in F1. This was a time when there were no pit lane speed limits, safety wasn't exactly at the forefront. You make a mistake today and you pay for it with a wrecked car, when Senna raced you might pay for a mistake with your life.
I've raced and won at Buckmore...I'm lucky to have Buckmore Park near me. Fantastic karting track where Hamilton and Button used to race. Unfortuntaly I've not been there as much as I'd like (not to mention weather out here has been pretty crappy).
In Chicago, good outdoor tracks were far and few between. Chicago Indoor Racing was as good as an indoor track as you could get. There was one past Joliet...Norway Karting in Sheridan, IL. No longer there I think, but that was pretty raw...nothing fancy about those carts.