Maybe it's the security lines at airports that have you frazzled. Or you see more of the airline personnel than your own family because you travel so much. Whatever the reason, you are seriously considering buying your own private airplane. Here are a few things you need to consider before making such an important decision. Types You could buy a Cessna 152 for about $10,000. It's barely flyable. Or you could fly more safely if you spent $20,000 to $50,000 on a more modern Cessna 172. Maybe you want to move up in class to a Cirrus-22 that...