Well, before everyone starts painting a too dark picture here, I want to put something against it and relativize. The loan always has the house as collateral. If worst comes to worst, you can sell it again. Therefore, I am more on the pro side if the opportunity is favorable.
If no child were involved, I would also say "Your problem, do it, what could happen..."
But with a 3-year-old child, I see it a bit differently. It doesn't help to be able to give your child a house on their 18th birthday if you had to live at welfare level for the 15 years before.
After deducting additional costs for your own house, the two loan installments, and some savings, there is 1,000 EUR left to live on. For everything.
With welfare benefits, you even end up with more at the end...
Even if you shouldn't shower your children with everything possible... you only have childhood once, you can't repeat it or make it up again.