On average, listings lease in the $10's per square foot per year. The Kissimmee region is going through a decline in rates. In the last 3 months, the median rate decreased $2 per sqft per year. That's a 9% decrease in rent.
In the last 90 days, 15 listings have been posted online, which means 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 1,900 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this area were built in 1969 and are Class A.