my best friend and one of the most successful student when I was in college (mechanical engineering degree, more later on that) was about 45, a vet, a guy used to working for everything instead of expecting things coming his way. Was a real stark contrast to most of the students, and he was very well respected by nearly everyone.
What I would suggest, if you can swing it and you are going to do anything with 'industrial' in the title, Industrial Engineering is often considered by other engineers (students and real engineers) as the easy path. Sure you can get a job with a company, be in the path to become a plant manager, maint engineer, something like that, or you can go the PE route, work for yourself (similar to the Snap On job would have been) or any number of other options. If you're dead set on your current field of study, go for it, but I would encourage you to at least look at a class list for IE and I think based on your posts you would probably be successful with it.