are portable air conditioners suppose to require draining every hour?

They can if you are in a very humid locale. I even have slight dripping here in the desert, so in a place like Georgia, it would be a continuous stream. You can modify the portable with a drain and a larger, removable container to catch the liquid so that you drain it less often. Another option would be to set it so that the drain is higher than the bottom of a window and run a drain hose out the window. (Put it on a stand, or table, etc.)

Portable air conditioners offer more flexibility than other window or through-the-wall air conditioners. Portable air conditioners have wheels and are compact (usually 2' - 3' tall).

yes that is normal , they are VERY wasteful of electricity because they expel expensive cooled air and draw more damp air into the room which is why there is so much water , only a through window/wall or split system will work economically, however you can usually attach a tube to drain the water continuously

Yes

There is no definitive fixed interval.

The higher the humidity, the more often draining will be necessary.

That is how air conditioning works.

Not that I've heard