mate, i honestly find that my car spends alot more time in the garage than on the track, and being unregistered means i cant participate in cruises or texi days etc which is a shame. The guys that have mildly modified street cars seem to have alot more fun. Take Liz for example, she has been at every event i have ever been at, and probably another dozen ontop. Its a mild 180 with the right mods for track work and she always has a ball, and the car always behaves.
I dont think i will get the full benefit out of my car until i start racing it in a series where i get it out at least every one to two months. And thats where the expense will come in, tyres, fuel, event entry etc.
everyones situation is different, but for me personally i wish i had something a bit milder that was registered so i could enjoy it more.