Its a buyers market in Calgary right now, in a year or two that could change....or it might not. We're moving to Calgary next year and plan to buy right away to take advantage of that and the current low interest rates.
On the other hand, there's something to be said for renting for a year to ensure you like the neighborhood. We've done that too and then ended up buying in the same neighborhood so this time we're going to trust our instincts.
As for waiting 2 years to put down 50%, that's more of an investment decision. It only takes 20% to buy a house (mortgage insurance free) and gain any equity from appreciation. If you think the appreciation is better than any other investment, maybe, but I'm not so sure about that. That's a significant amount of money that could be invested elsewhere and earn 5%, 7%....you get the picture.
Re-post in the Personal Finance section, you'll get quite a bit of feedback there from a $$$/investment perspective which might help.
https://www.city-data.com/forum/personal-finance/