Steffi and I did it at 49 and 46 (as of 2014).
This is our first house.
Reasons: I had already listed them here a long time ago: No more landlord.
This goal was achieved and the quality of life has - after the biggest stress was over (shell construction, the building time was not so fun) - massively increased compared to before. Well, until the terror in 2013 with that landlord the quality of life was also okay/good, but now: 1.0, that is really very great, such a small house for yourself. The icing on the cake is the comprehensively good neighborhood here. Number of unpleasant people = 0.0. Unbelievable. Only nice, friendly, and warm-hearted people.
Even if it costs a few euros more than the apartment used to: It was worth it.
Neighbors opposite: Built at 59 and 58 (2015). Out of the city center, into a similarly small house like ours. Also their first house in life.
So to speak: Needs-adapted, detached condominium replacement with garden.
I know here in the building area (13 detached single-family houses (of which 3 are still to be built) and about 45 terraced/semi-detached houses) two more with over 50, but the rest are then massively rather over 30 or over 40.
Best regards
Thorsten