Working in M&A / Advisory / Investment Banking

Hey guys. So I go to a non target school but have a pretty decent resume. 3.7 GPA, spent the summer working in strategic investments for a F500, founded a commercial painting company that does six figures in annual revenue and pays for my college. Unfortunately though, I'm not too optimistic about a SA position for an IB for me. Anybody have any advice on some internships to go for that might be more achievable? I'm hoping to work in M&A or Investment Banking or maybe even advisory for one of the big four. Any ideas would be appreciated.