Race off road! The Suzuki contingency program is awesome. They pay$400 for any class win as long as it's a Suzuki race, and they will tell you if it is or not, and as long as there's more than 6 people in the class. (as far as I know). There is a cap of $3200.
I have a couple of friends who, between Suzuki bucks and good deals through sponsoring dealerships, pay very very little for their bikes.
I usually end up spending more money than I could ever win by chasing contingency. The most I have ever one in a single race is $100. The most in a season, about $300 or so. There aren't really even that many races that are eligible and there are so many conditions limiting what you can win. But, if you ride a Suzuki , can sandbag and go to a lot of paying races, then yes, there is money to be made at the local level