They are in a very different climate from yours. You’ll need to remove yours for winter, but not because the queen might lay in them. I don’t know about the part about them being unusable after a few years, will have to wait for someone else to respond.
Reassembly really isn’t very hard. They only go together a certain way. But it’s not anything worse than tedious. I don’t know about the cleaning part, I just know that if you’re trying to see if your frames flex too much and you bend them they will fall apart all over your floor. 