I don't understand this widespread belief that you have a right to permanent ownership. Someone has to enforce that ownership, and that has costs. What does seem wrong in principle is taxing transfers of money, which are virtually free with modern computer systems, not to mention the increased economic friction in the labor market.
You raise a good point with liquidity. Personally, I wonder, how could we set up a system of fractional ownership that delays repossession in such cases? Of course, if you never pay tax on that heirloom, then you'll eventually lose a controlling interest- and I think this makes sense, especially for fundamentally limited resources like land.