You are in very good company - tens of thousands like you doing the same thing...  cash flow negative but hoping for the "mother of all capital gains" when it's time to cash out.  Please do yourself a favour and stress test your situation.  Could you manage a 40% fall across the board in real estate prices that would take 13 years to recover...  sounds implausible?   Well it happened right here in the GTA...

http://www.torontocondobubble.com/2013/02/toronto-housing-bubble-in-1980s.html