I have twins, now 6. You are going to need a DIPA and a Dubbel. Two years of little sleep was three times as tough.
One major thing that most people don't know. On the double stroller, there's a little cup holder, many people think this is where the kids bottle goes. WRONG. This is where your full bourbon or scotch glass goes. That way, when you pass out, the SWMBO finds it too hard to wake you, so you actually get a night's sleep. Selfishness sometimes equals survival with twins. Don't worry, she will, and deserves, to do it too.
At two years, magic happens. They start playing with each other, they get potty trained, and life is incredibly simplified. Don't quote me, but it actually is easier with twins once they reach that point. All equations have to balance out at some point, right?!
Now, they are my angels, my life, and the bestest of friends. Just do whatever it takes to survive those two years. Alcohol was a huge help for me. Then, the blessings continually flow.
Best of luck. Someday, they'll be your assistant brewers.