When oil fell at the end of 2014 our management told us that $43-$46 was the sweet spot. That specifically at my site and was before all the cost cutting. Just prior to this fire Suncor had announced the cost per barrel across the entire company is around $27 but that is company wide. I would expect my area (tar sands base plant) to be somewhere in the 30s.
The in general the low prices have crushed the economy in the city. Lots of people have been laid off. Those that have stayed are overloaded with work and have all their hours cut back. Housing prices have tanked.
The tar sands oil isn't a pure/clean as oil in the Middle East but it makes up for this in a couple ways. It's all in one spot so long term industrial infrastructure pays for itself. Drilling rigs aren't guaranteed to always hit, where as the oil sand is. All the other stuff in the oil produced up here is removed and either sold (map gas, propane, etc) or used in the process (diesel for the heavy haulers). Suncor specifically, has long term deals with companies to protect against unstable oil markets and it also owns PetroCanada, which is one of the major gas station chains in Canada. As for transportation, it is an issue (trucks) right now but there's 3 purposed pipelines, Keystone, western Canada and eastern Canada.
As for the fire, my bosses have already been in contact with me about going back up. We were at the tail end of a shutdown, so when we go back we should be able to button everything up and have full production for a while the dust settles. Maybe a week to 10 days of lost production.
Let me know if you I missed what you were asking.