Earlier quoted context omitted.
10% is the absolute minimum and doesn't buy you anything of the house, it just covers the legal and realtor fees.
That is mad. On a 500,000 EUR house, 50,000 EUR goes to realtors and lawyers?! What on earth are they doing for that kind of money? Is that including some large tax? In the UK, you wouldn’t pay more than a few thousand for a lawyer and associated conveyancing fees, and the vendor pays the realtor (usually in the range of 0.5-1.5% I believe). We do have stamp duty (tax) which can be substantial eg 15,000 on a 500,000…
I swore to my wife that I'm not paying almost 20K to the person giving me a tour of a house.
Seems like selling houses might be a better job than software.