Yay or Nay to Summer School

So I haven't been on the app for a very very long time but I can use so much advice and opinions on this matter. So I'm a university student. My advisor suggested I take summer courses so I can graduate May 2018 without the summer courses I would finish school Fall 2018. The thing is summer session isn't covered fully by financial aid. I got lucky and got my tuition reduced from $3000 to $800. So my husband is the only one working and we have two kids as well. I feel like it's still a lot of money especially for a one person income. My husband said go for it but I feel like those $800 can go for something else and I should just wait. I mean i wanna graduate already but i feel like if i get my expenses fully paid during regular semesters then I should just wait it out. Idk what to do I'm conflicted. Also I would have to pay out of pocket for my books. The tuition is just for 2 classes. What you guys do?