We have lots of arbutus up here, and its a pretty tree.
ive heard of bows being built from it, but its not great.
apparently very hard and oily, takes along time to season, and
not very strong in tension so it needs backing.
good luck finding a long and straight enough stave.
also, under the very attractive bark, is a pretty boring white ish wood.
Its probably more suited for character furniture in my opinion