Lots of ways to race KOH.
If you wanna race in the main event in 4400, bring a fat ass wallet, a checkbook, some credit cards, then some more credit cards.....
But some of the other classes arent as bad. Especially if you dont also have the cost of trying to qualify into a starting position like in 4400.
This is my insight on racing. The truck/trailer/racecar are the cheap part. The racing is expensive. To/from event, prep, place to stay (I dont count food, you have to eat no matter where you are), parts you wreck.
I qualified in to KOH'15 in Kentucky. Wasnt a big expense race, but I blew a tire and THAT was expensive. Tire, wheel, tireballs, brake, and Spidertrax pro-hub star all destroyed. Thats a $2600'ish chunk of concrete I hit.