回复：现有mortgage,不算太多，想换大房子，不专为投资。

想换房子就换，没有说什么是时候，经济许可就是时候，你只是换房子，如果房价高，你的房子也会卖得高，你的房子价钱LOW低，你要买的房子相对也会低。

IF FOR ME, FIRSTLY,I WILL GO TO FIND THE NEW HOUSE I LIKE,SECONDLY, I WILL CACULATE THE COSTS OF THE NEW HOUSE, AND CAN I OFFORD IT, EVEN AFTER SALE OF THE PERSENT HOUSE, MAY BE IT NEEDS A BIT MORE ON THE TOP OF PRESENT MORTGAGE WITHOUT EFFECTING THE LIFE SYTLE I HAVE NOW.

GOOD LUCK