M.C.
I would stick with your 4 days a week. I think at this age, 3, it's important to stick with a reasonable schedule. He needs to get home at a decent time, eat dinner with you and dad, and get to bed at a good hour. It's really hard on little ones to have such a long day. I know, I had my dd in daycare for just a little bit when I worked 12 hour shifts in Dallas. It would turn into a 14 hour day by the time we'd get home. She was exhausted and it just wasn't worth it.