I don't think this decision should be made while you are off for the summer. Everyone dreads going back to work after vacation and a 2 month pause from work to be home with your kids is a BIG vacation. I would wait until you are back to work for a good month or so and revisit the thought.
Try some things to free up time. Can you hire a part time sitter to supper prep and homework instead of sending boys to daycare? Some small things to free up time will be nice.
Remember right now you have the ability to stop work to go to school events you can't do this with home daycare. Also, right now you have 2 full months off to be with your boys you won't have this with home daycare...sure you'll be with them more but you will be sharing your time with many kids...which is not the same.
I'd be weary of quitting your dream job for a second time...because odds are they won't come looking for you in a few years...when your boys are much older and independent and need less help and just want to hang out with their friends.