If you use wise and select the "buying property" option, it means wise don't do the exchange and sent the money to a Thai bank for exchange, as per the buying property requirements. When sending large amounts of money, with a fixed fee (swift is $10-20 no matter the amount), it works out to be a better fees/exchange rate than wise, which is a sliding scale and ends up being a substantial fee on large amounts, more than any exchange rate savings..
Wise has all sorts of limits and you cant send enough to buy a property, in one transfer.