Most Hog breeders try to keep them locality pure which means no morphs unless they occurr naturally within the locality. So far, I'm not aware of any morphs turning up in Hogs. If you find an albino Hog, then it's almost certainly a cross and not pure Hog.
Generally, a male BCI will be about the same size as a pure Hog Island. Especially if you just raise it up as a pet. If you keep him on rats, he's not likely to exceed 5-7ft. That's not a garuantee and larger males are known, but some Hogs have been known to get big too so you'd probably be running the same risk either way.