There's a reason schools start Kindergarten registration months in advance. It takes a year just to fill out all the paperwork and make sure your child knows enough "personal information" to make the cut before he starts (more like his address & phone number, less like "Mommy has long utters").
There's a reason people don't start University courses the same week they plan to move from one city to another. People who hook up the Internet for your courses don't come on time and you miss deadlines. You could have gone to McDonald's for free wi-fi, but you're feeling a little lazy after packing & hauling.
There's a reason landlords do not move into houses they have rented out. The dishwasher won't drain, the ceiling fan will mildly electrocute your husband, and there will be dog poop petrified to the floor of your garage.
There's a reason you pack your appliances rather than sell them when you move. If you need them again, you won't have to use a toaster oven and a dorm-sized fridge until you get new ones. You child, however, might enjoy having a house full of things just his size for once.
Lastly, there must be a reason why no one will attempt to buy your house... until the day after you move back into it. I just haven't figured that one out yet.