Wow, so many having problems with their alternators. And yet, some having no trouble at all using the very same vehicles. Let's see, what might be the difference? Could it be that some of them have sound systems sucking more power than the alternator can handle? Could it be that some people run their batteries down to nothing via these same sound systems (when the car is not running), then blow the alternator when it tries to recharge the virtually dead battery? Perhaps, through lack of maintenance, or too many years without being replaced, the battery finally pukes, taking the alternator with it?
Any car is going to require periodic maintenance. Seems as though some of these new Toyotas are more touchy about having their oil changed than engines of the past. I hear the timing belt replacement issue has fallen off due to a trend toward timing chains instead. What a concept! But if you do buy a used econobox, you'll still be facing that timing belt issue. Oh, and CV joints, batteries, exhaust systems, struts, filters, fuel pumps, window motors, shifter linkage, wimpy automatics, wheel bearings, brakes, warped rotors... NO CAR is immune!
Next time around, make sure you buy a used car with a good foundation, driven by an old lady (NOT a "sports" car), and be prepared to do maintenance and make repairs. Some of these Japanese cars break down less than their domestic counterparts, but look at the price for replacement parts in comparison. Not to mention the cost of labor, depending on who does the work, and the initial price of it. Go see what your mechanic drives, that should tell ya something. One of mine has an older F-150 for a daily driver and a frame up restored '67 GTO for show. The other uses an older GM full size cargo van, but I don't know what else. Anyway, your mechanic can point you to something trustworthy, durable, cheap and easy to repair.