If the last house tipped you over, it seems to me that stamp of 15k would be paid off in just 4 years (4k land tax yearly). But land tax is tax deductible. So maybe the pay off period is much longer. And you'd also want to move the most expensive property out because the LV will keep increasing and you don't want to negate any benefits too quickly. What do you think? Or am I missing something here?