Woodslab you #$%^&!
I have a small stash of Burls, but you lucky individual have a motsa.
I have carved by hand and grinder and turned burl bowls. It can be damn hard work whichever way you go. If some of the larger burls are still green, I would rough the bowl now. Allow to dry, then finish . . . it is easier on the tools and your sanity
Work is a necessary evil to be avoided. Mark Twain