Don't think I'm trying to bash you, man. I can definitely understand you guys working out any kinks being this being a first time putting together a show. At first I was skeptical about you coming forth and saying that you guys were going to keep half the money, but remembered that you'll be shelling out a few dollars and would like to recoup some of it at least.
About the pricing set up you have. I've been to plenty of shows and have seen plenty where if you're just spectating, it costs a few dollars to get in, but if you're entering a car, that entry fee covers the admission as well. And I've been going to car shows since the 1980s, lolol.
Good luck to you and your show. Hopefully it will work out as you hope it will.