Four pallets from a business down the street from the office - stopped and asked and I got 4 free and help loading them in the Jeep. Now that's nice!
The lattice I already had and didn't have any plans to use so that made the back. Three pieces - one extra large and two short but it worked out just right.
I have a little more to do - stapling wire on the back and sides (I have some left over from something) and a board in the front of each bin - have some of those laying around too. Then I can get started . . . .
Can you see her ball - it got stuck or dropped in between the boards.
Lily was a really big help!