>>uuhmm, if a company is sold,where the main amount of capital is invested in real estate and large blocks change, the stamp/transfer tax for the real estate can be invoked by our version of IRS...

I agree it only can work if the company itself never is "sold", but parcels of shares are transferred via whatever means and the property stays vested in the perpetual legal entity.

>>how much in % compared to typical rent ?

Good question- and I have no contemporary idea, though rents would need to cover the rates as well as the return on investment unless capital gain is very large.

>>non sequitur to me to argue that stamp duty is the main reason for that...

It's not... but no point focusing on property taxes etc when the cost of property already is magnitudes greater. Strain out a gnat but swallow a camel etc etc..