Entry Fee is fine by me considering your reputation Vykos I would not be worried about the money walking away. IMO this is the next step for league racing.
For me I enjoy the Tintops over the single seaters. I don't mind if someone rubs me when we are side-by-side, rubbin's racin' and with Single Seaters that really isnt possible. The season for me would be driven with 1 car over different tracks, excluding most of the really big open tracks in hopes of getting more racing in, I get bored with long straits. For the actual racing I would like to see multiple short heats with a quali to start and a feature at the end.
Prizes, they are always nice and IMO they push people that bit farther. Sure sometimes people go overboard, but thats what a complaint proceedure is in place for, to prevent these. Exactly what, depends =P