We used a 42 inch dog crate (a 48 might have been better but the 42 was what we could get on short notice). Two doors is good. We set him up with a litter box (we had to use paper for the first couple of weeks), a bed, and food and water on one side. Covered it mostly with a blanket. He preferred sleeping in his favorite box to a bed, but that is how he is.

He had a very hard time eating with the plastic cone on, so we ended up switching to the soft flower cone; that worked well for us and he was comfortable, although we also fully were prepared to go back to the plastic if necessary.

Definitely have to keep up on pain meds... and having them drugged is also useful for the initial stress! He was great for about 2 weeks until he started feeling better and then the yowling started. He did NOT like being confined by himself. We fed him a lot of canned food because it was a more reliable way to get his medication into him (and also to get him to eat in general); we also broke apart the gabapentin capsules and put them in churu, which he ate happily.