Colleges with strong engineering programs that are low cost OOS or give good merit aid with 29 ACT?

Look into University of South Florida (USF) in Tampa. It has a strong engineering program (offering programs in Chemical, Civil, Computer, Electrical, Industrial and Mechanical engineering).

Currently your ACT/GPA would qualify you for their highest level OOS scholarship.

OOS tuition is $17,324 a year. They also have a few other scholarships that would stack with the Presidential Award.

https://www.usf.edu/admissions/freshmen/admissions-scholarships/nonflorida.aspx

USF uses rolling admissions, but you should apply soon, while merit funding is still available (if interested).

Good Luck!