I have found that 20lb bale is light enough to sit on top of the crate that is hooked up to rabbit’s pen, which is perfect for serving because inevitably when you pull some out of the bale you will have strands fall all over. It’s just messy to serve. So having it on top of the crate, the strands that fall end up in the crate and the litterbox, where I serve it anyways. I can’t imagine having to track it a couple rooms over, I would have to vacuum every day! So, just a thought, store it as close to where you will feed it as you can. I also have some of his other things (a small box with nail clippers, treats, etc) that I need handy and a second bag of hay (9lb of orchard), so I was surprised how much weight the crate could handle. I don’t know what your habitat setup is, but this is working out really well for me.
If you can get good shipping prices, it really is worth it to get the larger sizes. I know my hay comes with some holes in the bag and says hay should be stored so it can breathe some, I don’t know if that helps to prevent mold or what. But that’s what the company that sells it recommends.