partnership is not an option for me unfortunately, i live in a secluded area and there are barely any pilots here..
other than the cessna's, are there any other economical airplane i should consider?
Don't rule out some of the older (as in 1940-1960) 2-seaters- Cessna 140s and Luscombe 8s are still available at surprising prices, and are extremely economical to operate... and the maintenance, with the right airplane, is not as big a deal as you might expect with a 50+-yr-old aircraft. A "cheap" 150 that has been abused doing flight school duty all its life is no bargain, and some of the old 2-seat taildraggers have low-time airframes that are well-kept and require very little maintenance on their simpler systems. Never flown a Luscombe, but the "quirks" you may have heard of are mythical (ask any Luscombe owner), and a Cessna 140 is really just an early 150 with a tailwheel, at least the "A" model is. Same wing, same center section. I've flown 140s, and they fly just like 150s.
I've seen some with IFR setups adequate for IR training and "lite" IFR, and no, they don't all have fabric wings, nor do they all have a bazillion hours on them. Many are also able to use auto fuel (assuming you can get some without all the ethanol in it), which can save a lot of money. As it is, the 75 and 85-hp 2-seaters will burn 4-6 gph, and some, the Luscombes especially, can outperform a 150. The later 140As and Luscombe 8Fs also have flaps... manual, of course, which means no motors, wiring, etc associated with that.
Naturally, you'll see some really fine ones out of your price range, but like 150s, there are some decent IFR-equipped ones that are very affordable.
They are, of course, taildraggers, but learning to handle them is not a big deal. And no nosewheel strut/mounts/shimmy damper to worry about ($$).
You can see a couple examples of what I'm describing here... look under "Antique/classic" and "Taildragger".
http://www.barnstormers.com/cat.php?mode=listing&main=