Which carries more weight in selecting a college: graduation rate or avg cost of attending?

If you look at perhaps a low tier (ranking highly impacted by graduation rate) you’re looking at sub 10% to the teens graduation rate but also benefit by the cheapest 4 yr college tuition in the state by a good margin (E.G. CSUs vs UCs). At these schools getting core bottleneck classes can be difficult delaying your graduation a couple semesters. So there you get to pit competing factors together… But if you come to the low tier loaded with APs unlike the normal student that goes to better colleges you rid the getting your classes problem completely because you have priority registration.