Have you not read some of the other posts we've had recently where other wives have wanted to leave/kick them out, but for one reason or another, money, fear, depression, have been unable to do so? They were beyond miserable, some of them felt utterly trapped and beyond all help. The DC suffered too.
We ALL appreciate you are angry, hurt and confused. Of course you want to hurt him back, but it'll eat you up at a time where you need to be most calm and most rational to plan the future.
OK let's assume so it IS over. Take a moment and work out what needs doing first, are you going to get him to leave.. Would he go? There have been posts here where she has asked him to go, and he refuses, her a SAHM so feeling powerless and trapped.
If he won't leave, you are going to have to sort out a place to live first, rented in the short term. Save up a deposit, look at areas, schools etc and see what's what.
Remember revenge is a dish best served cold, and if your revenge is the ability to walk away from him without looking back, then that'll hit him straight between the eyes.
Keep calm. Above all Keep calm. Otherwise you may make costly mistakes, both financial and emotional.
Keep posting, we'll do our best to help you, anytime you need it.