In Frankfurt (outskirts) you can at least double the value. ... . It probably won’t be much easier in Hanover (if he lives there directly).
In the Hamburg area, you can definitely get something in that range, and Hamburg is definitely more expensive than Hanover. But that’s exactly why the note about the outskirts.
Still, for the OP with the information he has given, it’s highly unrealistic at this point. Such a terraced house already costs 25-30k€ in ancillary acquisition costs
It’s not like there are no banks that would do 110% financing. Or you could save the money in 2-3 years, possibly involving relatives.
Let’s assume a house including ancillary acquisition costs of 250,000€.
That means, with an interest rate of 3% and 2% repayment, we’re at about 1050€. Plus 400€ ancillary costs, so we’re just under 1500€. If the two plan with 2 children, there will hardly be a rental apartment below this amount in Hanover.
Edit: By the way, I didn’t mean to say that I would recommend this plan. However, I find it important to point out that children usually not only mean monthly costs and a change in income, but also generally a move to a larger rental apartment.
For a family of four, I can’t get a decent apartment in Hamburg for less than 1800€ monthly.