As for the race season, I'm considering giving up with the CSCC plan, and joining the castle combe racing club, entering the saloon car championship. The races are 15 mins, roughly a third of the race time in the tin tops, and I should still have enough grunt to be in the thick of some decent action. Plus it has the added bonus of always being at combe, which is about 10 mins from me. I reckon a big chunk of season cost can be cut by doing this. I could progress to a different race series when I have more money, I'm considering quitting my job and getting one elsewhere where the pay is better, to fund all this.
Cost of traveling will only be a small part of the budget, if you're happy to pick and choose events then you can cover that by doing races with lower entry fees. Combe saloons is big budget - I know it's easy to say "Oh, but I won't spend more than I have to", but it's easy to end up racing on Sunday and buying on Monday.
I would suggest that for the first year or so you try a couple of different series, spend more on trackdays than racing, or at least do those races where you'll have someone to play with. CSCC will be good for that, or Trackday Trophy, or somewhere that does double-headers. The idea of two-driver races appeals, except I don't trust anyone else enough with my car.
Also, remember that racing is only a small part of life. Do the job that makes you happiest!
________________________________________
"Talking about badgers is life. Anything before or after is just waiting" Steve McBadgerTransversa aurigatio transcurro arvae.