The $80K price on most GA aircraft indicates the engine is time expired, "on condition" and prop close to overhaul.
And that's the tip of the 'known' iceberg. Add AD compliance, corrosion, maintenance history, overhaul history, paint, interior, instruments, even the ****e rubber on the wheels costs a lot to replace. Then airport fees, hangarage fees and charges etc etc. If you skimp too much on price of purchase and don't do the hard work getting a good one you may never fly it due cost of making it airworthy. Not trying to put you off, but you have to go into aviation with 'enough' cash to make it enjoyable. I've owned and managed quite a number of aircraft and its fun and rewarding, but some will drive you nuts and bankrupt if you don't know what you are doing. That being said, boats are cheaper but far worse ongoing cost wise, I'd much rather bare the costs of an aircraft over a boat, watercraft just try to destroy themselves when doing nothing.