Mark wrote:
To follow up more on #2 - if you can afford it now, get it now. Simply
because, if you know you'll want/need something bigger down the road, you may
not be able to afford it then. House prices go up - and fast. They may slow
down for a period, but they always go up.

No, they don't always go up. Sometimes they go down. Or people just
won't sell until they can break even, just like in the stock market.