I had the same problem, worked over-time (startup life), and took classes at two institutions as a way around the bureaucracy for pre-reqs. I ended up automating the class look up process using selenium on Firefox. But then they called me in because my account was making requests every second, and were worried more students would try what I was doing and crash the system. (The DID tell me to keep checking for open spots, they never said to not use scripts)

This was the only way I could get the classes I needed to graduate on time