Plan: House construction in 5-10 years

but 5-10 years is definitely a horizon in which you can build capital "relatively risk-free" with the right stocks

Which are the right ones? I am honestly interested, please preferably WKN or ISIN ... ;-)

For a period of 5-10 years, for example VW, BMW, BASF, classic DAX stocks that also provide corresponding dividends, although I also said that I would currently not fundamentally invest / enter anew

Just like you could have advised Eon and RWE 5 to 10 years ago? Or Commerzbank or Deutsche Bank? I am a big fan of stocks, I think it makes a lot of sense to participate in capital. But you have to be able to bear the risk. So rather ETFs that are broadly diversified (if stocks at all). But even then, if after eight years a crash occurs and the portfolio loses 30% to 50% of its value, the potential builder is left in a tough spot.