The typical asking rate per listing is in the $10's per square foot per year. The Port St. Joe submarket is going through a a rise in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 8% increase in rent.
In the last 90 days, 1 listings have come on the market, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. About 500% of the listings in the Port St. Joe are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,000 sqft. Most buildings in this region are close to 2 stories. Most buildings in this area were built in 2004 and are Class B.