Ok, thanks, this was really helpful! I've been looking at materials and they are more expensive than I thought, lol
Yeah, the building material industry got hit with more than inflation. It might be supply chain issues.
I've never tried these, so I don't really know. You could also use plywood.
Make sure it's formaldehyde-free plywood. On Home Depot's website, there's the brand "Columbia Forest Products" that offers non-toxic plywoods; pick a hamster-safe wood option. Lowes probably has a non-toxic plywood as well, though I don't know the brand name.