Job opportunity

I have a dilemma. I've been offered a permanent job from my sometimes weekend position of house sales assistant. That would mean leaving my current position, where I just received a promotion and there is plenty of room for advancement if I want it. The pro's the new job would have are a 50% pay raise with bonuses, I would work three days a week instead of 4, and I would be away from my current boss. The cons to this new job - it can be very boring, days of no customers coming in, I would be working until 6 pm which would mean my son would have to go to daycare after school. I asked him if he would like to do daycare after school, to see his friends and play. He said "no way". Hmmm. Plus, because it is in house sales, I would not be close to home forever - eventually all the houses would sell and we would move to a new location. I don't know what to do. Any suggestions?