The typical asking rate per listing is in the $10's per square foot per year. The Hurst region is going through a a rise in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 6% rise in rent.
Compared to the rest of the DFW Metroplex market, the Hurst submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 12 listings have been made available, which means spaces 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 2,500 sqft. Most properties in this area are close to 1 stories. Most buildings in this market were built in 1985 and are Class B.