I would be hesitant to spend an entire season in Fernie, especially if you're looking to easily find work.
Big White may be "cut off", but it's nothing compared to the small-town nature of the Kootenays (and Fernie is tiny). At least with Kelowna, you have viable options for doing other stuff or going to other resorts for periods of time.
Also, Fernie is an RCR (aka dickholes
) resort, if that makes any difference.
And contrary to public belief, the snow is not always stellar at Fernie.