Do you have an opinion?

So here is the low down, the girl they hired over me at the daycare center, got fired today. And guess what? They asked me to fill in for the summer. I just don't get what I am doing wrong or right, how ever you look at it. Now the in home care I do wants me to work 3 12 hour shifts in a row, all week end. Now what seems better? Days, 8 hours, with 3&4 year old or the 3 nights with the elderly? I could do both I guess but 76 hour weeks are a bit much I think. When it rains it pours. Decisions on top of decisions. Give me a yell out if you have an opinion.