There's also c) Don't pay off mortgage on small house, rent it out instead (and hopefully have it cover its own mortgage and property tax), and then also get a

There's also c) Don't pay off mortgage on small house, rent it out instead (and hopefully have it cover its own mortgage and property tax), and then also get a new mortgage and buy a bigger house. It's similar to (a), but makes more sense if you're in an area like SF bay area where you might take a bet on real estate to keep rising. London may be similar? Just another idea!