PulteGroup’s Northeast Florida Division has started building a mortgage-free home for U.S. Army Staff Sgt. Antwian Cooper in the Centex community of Wells Landing.

The former U.S. sergeant served a little more than a decade in the Marine Corps before having to medically retire after suffering from a traumatic brain injury in Afghanistan.

Practically every minute of every hour, someone sends a tweet to Bill Pulte, a 33-year-old private-equity investor and heir to the mammoth PulteGroup homebuilding company.