Around here the have what called the hornet class. It's front wheel drive cars that can be picked up pretty cheap and the rules are simple.
sounds like you need to start in the bottom class of your track and work your way up. Then if your good enough maybe someone will take notice and let you try to step up.
Another option is to find a friend or 2 to go in on a car together. Take turns driving if you have to. It's better to race 1/2 the events instead of none.
Of course you could take up drag racing and use your daily driver. :wink: