Follow Tony Stewart's model. Make the races events. Keep contact with your fans. Especially, those who travel to your track. Email contacts would work. Then make darn sure they are well designed. Identify your area that you draw from. Upgrade your appearance to the public, not a bunch of hicks running old cars straight from the junk yard. But make yourself professional. Those are vintage car races, THE STOCK CLASS everyone, anyone can race. See be a business, make good out of what you have to offer. Right ?
Bring in the local businesses, acquire sponsorship for your tracks activities. There are many sources of revenue. I can think of bunches.
There are so many things you could do that does not cost a cent, or very little. It is more putting the effort in to it. If you acquire sponsors you could do some special event purses for your late models. I would work the local car dealers, and the salesmen individually. Get them in a head lock, and haunt the place. You want trucks to use, cars for special events to show in the infield. AND MONEY. Let the salesmen work the infield for prospects, BUT they have to have the actual cars, and the dealership MUST put up CASH.
Better one GOOD night a week of racing then several that suck. Right ?
See, you should have hired me. We could have been a long way down the road by now. Unfortunately the more behind the curve you get, the harder it is to make headway. Hit my email here if you want any more ideas. I have bunches. Kind of know the area, I have lived in Kansas, all my relatives are still there, going back to 1900. If you knew my name you would know right away where I came from. Heck my name is widely known by all world over, especially attached to that area of the U.S.
I can make a race out of anything. I just hope you race to the bank friend, good luck.
EDIT : Oh, and a thumbs up for roughboy68oh also.