Buy the most gi-normous, gas-guzzling old convertible you can find for the lowest price possible. Then drive it. Don't tune it up, don't put wheels on it, don't paint it. Don't even hose it off. Just cruise in windblown bliss till your hair falls out. Charge your buddies gas money every weekend and this thing will pay for itself in no time. At the end of the summer, throw one of those ugly blue tarps over it to minimize the mold buildup during winter weather, then break it out again next year.