Any recommendations for store-bought enclosures?

It’s come to my attention that my Patches’ enclosure is much, much too small. The guys at the rescue told me it was big enough and so did the vet, but everywhere online says it’s too small and I don’t feel like taking risks.

I don’t know the exact dimensions, but it’s probably like 2x4 ft.. now, he’s still tiny so I was waiting to see how big he got, but the vet told me he was nearly fully grown and just abnormally small. Nothing of concern, just under average, but since I know he’s not getting any bigger I’ve started to look into an upgrade. I heard that 4x8 ft was the minimum, which I don’t really have the space for so please tell me if I’m wrong. I also don’t have 1,000$, so if that’s the budget I’m looking at for a pre-made one it’s going to be Home Depot or eBay lol. I’d say my budget is maybe half that give or take. But if anyone has any suggestions that’d be amazing!

(also please don’t suggest rehoming. Worst case scenario I have to make room for the 4x8 enclosure and/or get a job to afford it. He’s not going anywhere, ive seen people be really quick to suggest rehoming on this sub, but I assure you I’m dedicated enough to meet his needs no matter what)

Here’s a photo of the angel for your troubles :]