If we dig into the BLS numbers for the people doing the work in what HN tends to talk about as trade workers:
Plumber - median $61,550 per year [1]
HVAC tech - median $57,300 per year [2]
Electrician - median $61,590 per year [3]
Framer(Carpenter) - median $56,350 per year [4]
Bricklayer(Mason) - median $53,010 per year[5]
Software engineer - median $130,160 per year [6]
Of course, these are national numbers. We could pick and choose geographical areas to bump up the averages.It isn't immediately obvious to me what data source could give us a good answer to net worth by age for any of these careers. That is why I asked if you had a reference for it. It's even murkier when looking for data on when someone in the trades buys a house on average.
My intuition (and I definitely don't mind being proved wrong) is that high earning, high-ish net worth trade workers is a story we want very much want to be true. But I just don't think it is, especially if we are talking about the average case.
[1] https://www.bls.gov/ooh/construction-and-extraction/plumbers-pipefitters-and-steamfitters.htm
[2] https://www.bls.gov/ooh/installation-maintenance-and-repair/heating-air-conditioning-and-refrigeration-mechanics-and-installers.htm
[3] https://www.bls.gov/ooh/construction-and-extraction/electricians.htm
[4] https://www.bls.gov/ooh/construction-and-extraction/carpenters.htm
[5] https://www.bls.gov/ooh/construction-and-extraction/brickmasons-blockmasons-and-stonemasons.htm
[6] https://www.bls.gov/ooh/computer-and-information-technology/software-developers.htm