2006 was one of several years where the houses were completed too fast to meet the huge demand for normal quality control here in Florida.
Without seeing the actual house, I’d bet the leaks are at the window frame/stucco transition, and the “stucco” (cementitious coating) itself is poorly applied and too thin. Very common defects in this area, resulting in water intrusion after heavy rain, or wind driven rain.
Start by sealing the windows, seal the hairline stucco cracks, and paint the exterior walls with high quality paint. If this is a 2 story house, don’t forget to look up and see what’s going there. And make sure your irrigation system isn’t soaking the wall when your not looking.
Dom.