Well, I put the word out and came up with two options. In the meantime, I was indeed looking for used stuff, Sandy. I was even thinking of getting slabs from the sawmill to make walls on a frame of new lumber. But, in the end, here's what's happening:
Option 1: free -- part of a steel building -- only 10' long but probably about 20' wide. So I'll have to close in one side completely and before the winter I'd like to close half of the other side
Option 2: $250 -- a car port -- but I need to look at it first. I'm a bit concerned about the possibility of getting a foot hooked over one of the metal support tubes. Good thing these new horses are old and calm.
They're coming next weekend I think, so I'd better get hopping!