Buy one!! I bought a 1946 Cessna 120 that burns 4.5GPH. Thats $19.30/hr in fuel costs. 100LL is $4.30 here in Arkansas

Break down of (my) ownership costs:
$800/yr Hangar rental
$1300/yr Insurance
$1250/yr Annual inspection
$1000/yr Random maitnence and parts (if you know an A&P pretty well)

Thats + or - $4350/yr just to own it and keep it flight worthy. This cost would vary depending on unforseen maitnence.

$4837 250hrs worth of fuel
$1600 40hrs dual instruction

If I owned it for 2 years and fly through my commercial in 250hrs I will spend approximately 15k in costs. Throw in another 5k for crap i didnt think about.

If you buy a $25k airplane your spending $45k to get your commercial. Plus you come out of it with an airplane. If it takes a year to sell you have to add almost another 5k in costs to keep it flying.

How much did you spend to get a commercial?