Since as the saying goes if it flies floats or f*** its cheaper to rent it so for 30 grand I would buy:
300 ish hours in a Grumman Tiger
150 hours in a Pitts or a Yak 52
20 hours in a Hunter (Surely the best bang per buck you can buy, faster and cheaper than a spitfire)
Or any combination of the above and the option to chop and change as you please.
By all means if you really want the romance of ownership do so but it will cost you.
Good luck.