If you get a male I think you could keep him pretty happy in that enclosure. The fact that it was designed for a BP means it will probably hold humidity better. I currently have mine in 16qt tubs.

Male Hog Islands average about 4ft, so they are roughly the size of a ball python. If you do decide to go with a Hog Island make sure you get it from a good breeder and make sure it's a pure hog island boa and not some type of cross, those tend to get bigger.