>this type of planning is generally not economically feasible unless the taxpayer has a net worth exceeding around $300M You can actually achieve much the same effect by buying property and taking out a normal mortgage against it for living expenses which can be done by people of more normal means.
I think the piece that's missing (from my scenario and yours) is the assumption that your yearly gains from appreciation of the asset exceed your living expenses. That usually only happens reliably once the asset is worth tens of millions of dollars, at least. Especially if you have a family.