I wouldn't be surprised if some black swan breakthrough in automated assembly/modularization/mobility of housing in less than 30 years halves the availability o

I wouldn't be surprised if some black swan breakthrough in automated assembly/modularization/mobility of housing in less than 30 years halves the availability of manual plumbing work so that when your children just get 1 to 10 years into that career there is a sudden plummet of pay, possibly combined with an influx of workers coming in from previously wrecked markets.