One group has houses: they say that house price continues to go up,
the other group without houses say that price will go down.

I am the third part (not live in Vancouver): I will say: if you want to live in Vancouver and has the ability to buy a house, just buy it now and not wait. if you wait, you never can buy one. 30 years ago, a house in Vancouver costs 200-500K. now it is at least 10 times high. Also 30 years ago, salary only around $5000/year. now it is 10 times high.
My boss bought a house in Vanvoucer 30 years ago by $25,000 and sold it two years after and make $50,000 due to job cahnge. That time his salary 5000/year. Now He retired and back to Vancouver and bought the similar house by $660,000. this is what I know.

If you want to cheap, you should move to small city like.