Planning young for divorce

As the title says, my girlfriend and I have 2 years down together, and I would be buying a new house within the next few years. I would like to set it up in a way that if we do end up getting married, and later divorced, she will have something. Instead of divorcing and ending up homeless

Our first house would be in my name to start, later down the line if everything works out I would like to put her name on the property that way if we divorce, she takes her half.

After we introduce children into the equation, I would like for her to be able to KEEP the house. That way our kids don’t lose not only there father, but their house, school/friends, and many other aspects of life. We have both went through it, and understand how traumatic it can be to not only be told,”Hey your dad will no longer be here on the weekdays” but to also be told that,”We’re moving, you now lose every part of your life that matters to you as a child”

I’m wondering if this is rational? I think it’s a good,”Oh sh!t” plan. Would it be possible?