To answer a few of your comments, pressed bearing in the front are common. Some manufacturers still use bolt in assemblies for bearings, but those are pressed together too. Taking them apart does involve a lot more tear down on the front than the back on the aveo. The rear is so cheap because its practically included in the drum replacement, so you would most likely be paying only for parts.

I've done it both on the "side of the road" so to speak and in a shop setting, you basically do the same procedure with different tools. You can use a "clamping" force to push and pull the bearings in and out instead of a press. That is the big difference for the road side repair.

I think with my ride height and such my front bearings failed at 45k miles. But I have hear people stating 60k and such as well. I guess it goes with the road quality as well. Its good you go them done, I don't know how you could install a seat of tires and move the rim around and not catch bad bearings.. it would allow a whole different type of wobble.