Grad school?

So in talking with my grandpa today he asked what I was going to be doing over the summer. I replied that I was probably going to get a job. He asked why I wasn't taking classes over the summer as though I was slacking around merely earning money to pay down student loans and credit cards. He was completely dumbfounded that money was the only reason I wasn't taking courses towards my grad degree. I then became equally dumbfounded when he basically offered to pay for any courses I took this summer towards my grad degree!! I'm supposed to research how much it would cost to take a course or two this summer from the U of MN or U of IA. So a MA in English here I come!!!