So I see the whole thing somewhat critically. Your incomes are very good, but saving only €2,500 out of €8,000 net income is really little. Sure, one could argue that you can limit your lifestyle, but do you really want to and actually do that?? After all, you are indebting yourself until retirement and honestly, I don't believe anyone wants to restrict their whole life because of the house!!! Then children are planned, meaning one salary will at least partly (temporarily) disappear. With a 30-year fixed interest period and 2% repayment, I come to €3,000 financing costs. The additional costs come on top of that. Honestly, I don't see this as feasible for you!