總共也不夠兩年，算投資房

https://www.investopedia.com/articles/personal-finance/013014/tax-breaks-secondhome-owners.asp

Tax laws allow you to take up to $500,000 profit (if you're married and filing jointly; $250,000, if you’re single) tax-free on the sale of your primary residence. This primary-home sale exclusion doesn’t apply if you sell your second home; such a sale may leave on the hook for capital gains tax on your entire profit.