I agree with this.
It seems clear that you prefer Lehigh. I’d go there. You’re clearly an excellent student and will do well wherever you go. Go to the place that makes you happy. However, I would 100% forget the idea that you will move home after your first year. If you love it there, you are not going to want to live at home, trust me. CMU isn’t exactly known for a laid back atmosphere.
Lehigh does have one of the most beautiful campuses I’ve ever seen. As far as earnings post grad, College Factual (can’t link)shows about a $3,000 difference in average earnings. The fact that you got in CMU in the first place and your scholarship at Lehigh shows that you are going to do well for yourself wherever you go.