We are beginning to plan the construction of our house

I just wonder why the 50k is being questioned?

I am not questioning your 50k. I am questioning that there is more than a small minority capable of saving such amounts alongside their studies.

With the 735-800€ per month mentioned below, one has not yet been to the disco, bar, on vacation, bought an iPhone, etc. The student would have to earn 2000€ net on the side in order to reach 50k over the course of their studies. Even if the building savings are shared between two people, net earnings must still be assumed that I have not yet encountered. I don’t know any student who earns on average over 1000€ net (except maybe during semester breaks).

However, if it is about one partner being in a job since their mid-20s and the other supporting their existence as a student, then that is a completely different starting point. Then it is the full-time employed partner who saves the money, not the student.

Average cost of living as a student in: Berlin other federal states Baden-Württemberg Bavaria Berlin Brandenburg Bremen Hamburg Hesse Mecklenburg-Western Pomerania Lower Saxony Northern German terraced house Rhineland-Palatinate Saarland Saxony Saxony-Anhalt Schleswig-Holstein Thuringia
Rent including utilities: 296.36 €
Food: 170.73 €
Clothing, laundry, personal care: 59.58 €
Ongoing expenses for a car: [?]

Insurance contributions, vehicle tax and expenses for fuel/oil etc., per month

108.69 €
Expenses for public transport: [?]

for trips to the university, to parents, to friends, etc. – possibly contribution for a semester ticket per month

36.04 €
Health insurance, doctor costs, medication: 84.60 €
Telephone, internet, broadcasting and television fees: 52.04 €
Learning materials: 36.20 €
Total costs (car only): 808.20 €
Total costs (public transport only): 735.55 €