How much will it cost to immigrate to Canada?

How much will it cost to immigrate to Canada? I have cousins in the Ukraine that would very much so like to start a new life in Canada. But, before they can put any true consideration into this move the matter of money must be addressed.

They both have good jobs and are in a position to pay the necessary fees. At the same time, I don't want to see them taken for a ride either.

Thanks for any answers you may have.