The typical asking rate per listing is in the $10's per square foot per year. The Mountain Home submarket is seeing a a boost in rates. In the last 3 months, the median rate rose $14 per sqft per year.
In the last 90 days, 1 listings have come on the market, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. 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 850 sqft. Most buildings in this market were built in 2007 and are Class C.