Now that I'm remote, I plan to move to a rural area and grow some of my own food in a single family home. I don't think that should be considered hoarding.
That said, I'm a crazy pro individualism and no tax no government guy, so I have no real place in this thread. : p
That land would probably serve society better if it had more than a single family dwelling on it, you could have 10 families in walking distance of their jobs rather than one, and 9 families commuting via car.
Now, that argument doesn't help with switching too an LVT, but there are other reasons to be optimistic. Taxing Jeff Bezos at any level is worthless in comparison to a) Paying enough UBI that the warehouses would unionize, b) directly expropriating the warehouses into the postal system. (post : IP :: warehouse sku system : content-address based networking).
Basically, trying to account for the power of billionaries and mega corps in monetary terms is a dangerous exercise where they can probably out-loophole you.