Wayner Ag, I lived there for 4 years. As far are rental properties, there are really no complexes like you would find in the "lower 48". What large complexes do exist are either A. really nasty and run down or 2. Priced above so high it would make sense to just buy. I rented 3 different properties when I was there and they were 4 plex/6 plex type units owner by individuals. The last place I stayed at was built in 1975, had an alley way for a driveway and was 1000 sq. ft and I was paying $1000/month, that was 4 years ago. I was lucky to find that place as the owner has renovated some of the interior, but you have to be lucky.
As far as buying houses, if you are going to buy in Anchorage, expect to pay around $400k for a nice, newer home in a good part of town. Yes, there are bad parts with shootings/gangs, generally the Southwest/Southeast side of the city is the best, stay away from the Northside/downtown area. Lots of families live in the "valley" towns of Wasilla/Palmer where the cost of housing if cheaper, but that includes a 45 minute commute one way on a good day. Winter commutes from the valley could double depending on the snow/accidents.
There is no state income tax, no sales tax in the Anchorage itself and after you live there one calendar year you get the PFD which is roughly $1000/year per person. I myself would not want to raise a family there as you are pretty much isolated, but you can get flights from Seattle for about $300, but still that is a 6hr round trip. Winters are totally different than Denver. Expect first snow to star in mid October and stop in mid April. The first March I was there we had almost 3 feet of snow fall in 24 hours, madness. In the winter you will have the sun rise around 10am and set around 4pm. Summers though are great, all 3 months of them, you can get about 20 hours of sunlight.
Cost of everything from groceries, furniture, dining out is also a lot of higher. If your company offers a cost of living adjustment coming from Denver, I would seriously with a straight face tell them you need to pay me 25% more than what you are paying me now.