I couldn't imagine open wheel racing any cheaper than the "paragon" open 410 formula. I raced every night the doors were open, and averaged aprox $250 a night in expenses and most of that was gas for the truck. I used 15 gallons of fuel in the car on average, 1/2 an oil change every night, and 5 rr tires the entire season, (2 of which had 1 night each) and broke/mangled about $600 worth of stuff over the entire season. I have a $$$$ engine, but that certainly isn't an advantage for me and my inexperience. I saw lots of lower dollar engines more than carry their own. My dad's engine is a 100 % used internet special that cost way less than a good modified or stock car engine and was less than a 1/3 of the cost of his last ASCS 360 engine,used, on the "good guy" deal. Though I am new to this world, dry slick tracks seem to be a great HP equalizer. A few years older unlimited technology is whole lot cheaper than the trickest trick of the week technology in any kind of "limited engine rules" package and makes a whole bunch more power. The fact that Paragon averaged 40 sprints a night has to say something about it being a successful formula. I bet most tracks would kill to have 40 cars there every night they opened the doors, and I am sure the spectators always left at the end of the night feeling like they saw a good show for their dollars spent. I would think a "open" sprint program and 2 support classes that mirror the rules of the other local dirt tracks in the area would make a pretty successful venture for a regular program.