P-51 Mustang?
High speed crop duster.
The PA-48 was cheap because it was simple. Like, World War II simple. The Enforcer actually began as the Turbo Mustang, which Cavalier Aircraft Corporation developed in the late 1960s with the P-51 as a starting point. More than a decade later, Cavalier sold the rights to Piper, which renamed the plane as the Enforcer.