I bought a quater share of a 160HP Rallye......and now my flying costs me:
£40 per hobbs hour wet. Because we use the hobbs this rate covers fuel and annual maintenance, which tends to be based on tach hours.
£20 per month hangarage
no landing fees
quick to get airborne
Around £500 per year in cash calls for maintenance and insurance
I was lucky and got a share of a really good one which had just been rebuilt from scratch in 2005 (and a nice Breitling paint job

), with only 200 hours on the engine. Beats any PA28-161 in performance, is fun to fly, cleared for certain aero's - not that I've tried any, safe to fly, and good for STOL strips. Oh and has 4 seats. We've had 4 adults in it, but flying two with a bit of luggage on the back seat is the best way to fly.
Love it and it was the best thing I did.