Most listings are in the $10's per square foot per year. The Weslaco region is going through a decline in rates. In the last 3 months, the median rate decreased $8 per sqft per year. That's a 33% decline in rent.
In the last 90 days, 3 listings have been listed, which means new availabilities most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 5,000 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this area are approximately 2 floors.