Daddyz got it right.
Its racing, its expensive.
It doesn't matter about rules because guys will always find a way to blow there money.
I here all the time that theres no money for guys to race, yet 3 guys within a block of us have at least 30 grand in there Polaris utvs. If I go down to the country store or the local watering hole there might be up to 20-30 razr's parked outside on the typical summer weekend. All are tricked out and uber expensive. Almost all these guys also have big bucks invested in snowmobiles. All these things you just walk into a local store and leave 100% ready to have fun. You have to build or setup nothing.
If you are driven to race you do what you have to. Most all racers I know skimp in other areas of there life to be able to race. Racers race, they find something to get there rush. Guys on the fence whine about money. If your low budget and really want to race midgets aint your thing anyhow.