Visitor parking

Today was my first day of school this semester. I'm just taking one class. The class is twice a week and it starts at 3:40pm. This ruins all my plans because the institute parking lot where I've always parked is open to the public until 4:00. I was on my way up to buy a $90 parking pass for the semester so I could legally park a half mile away from my class, but then I had another idea. There is "visitor" parking a few yards from the building my class is in. I did some quick calculations and actually, if I just pay for visitor parking, I will probably end up spending less then the $90 for a parking pass. And I'll be SO close to my class! I'm thankful for close parking because my hip has been so sore the last few days!