She's not a hog island, but I keep my 2yr old 5 foot BCI in a 116qt Sterilite tub and she seems to have plenty of space at the moment. It has a lot of height and is sturdy. Planning on upgrading her to a custom cage (either 4x2x2 or 6x2x1) within the next 18 months. I'm sure a hog would feel right at home in a tub setup for a long time.

Eve's setup (minus the hide - she outgrew it!):