Hey guys,
I work for a large multifamily owner. We need to consider what each type of ownership group wants.
1. Large asset holders (typically backed by institutional money): When these guys enter a market either through buying existing product or developing new it's simply because in their view, usually long term, the investment meets their requirements of return. For these guys keeping units empty is a matter of managing market pricing. Although it may cost you a month of vacancy it's worth it to hold onto the unit and maintain your market rents. If you're empty for the next year or two that doesn't bust you, but accepting much less than anticipated in the long term will. For these assets holders the buildings are viewed like any other income generating asset, and in that mindset average rents are more important that current vacancy.
2. Accidental landlords: Usually this includes multifamily developers who don't sellout projects. In most cases (hopefully), when they get down to the last unsold units the actual cost of that unit to them is very low if not nil. For these guys it's a tough decision. You can rent for a period of time and make some cash at the expense of wear and tear or you keep it open as inventory hoping for a sale sooner than later. In my experience these companies are not great landlords, their business is to build, sell and move on. We've seen more of these units enter the rental pool recently as guys are hoping the damage and issues of managing rentals are outweighed by future price appreciation.
3. Small time owners: These are the guys we think of most, and you're right for the most part they cannot afford vacancy and don't really care about managing market rents as long as they are full and have decent tenants. Usually this type of owner has older product and will be more flexible when it comes to rates and lease terms.
In terms of affordability Calgary is fairly affordable however one argument for building new affordable is product mix, not all units are equal and in a lot of cases the new inventory fills holes.
final note - the above comments are based on "the rational manager", there are some terrible managers and great managers who will get much different results from the same assets.
Anyway, I've written too much.