Small Budgets can still get your name on a racecar.
There are options with race teams (NASCAR CUP, BUSCH & TRUCK) (ARCA) (HOOTERS PROCUP) that offer to put your name, or your business name, on a racecar for certain events for just a few thousand dollars. It may not be well known but "Associate" Sponsor/Marketing programs make up a very important part of a team's marketing partnership package. "Associates" gain valuable exposure by association with a major team and a major sponsor and are offered individual programs at events.