I would leave out the numbers. We have a similar income, but currently only my husband is working. Well, we have 2 children (which cost quite a bit), but it's already tight. Our repayment is €1050. I just had to cancel the summer vacation again because it simply doesn't work right now. We have only financed €239,000.
So from personal experience, I would leave it, because the land is still added and at the latest when a child arrives, the house of cards collapses. For us, it will soon ease up as I will be going back to work soon. But in the long run and in your case, prospectively because of the children, even worse... no, I would advise against it. I don't want to imagine the mood that will prevail when the desire for children hits with full force and then it can't happen because you have to pay off the house. Sorry to say it so bluntly, but in this case I really see it that way.