The typical asking rate per listing is in the $10's per square foot per year. The Wasilla region is going through a a rise in rates. In the last 3 months, the median rate increased $18 per sqft per year.
In the last 90 days, 4 listings have been posted online, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 500% of the available space in the Wasilla are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 650 sqft. Most buildings in this market are around 2 stories. Most buildings in this market were built in 1984 and are Class A.