How naive. PE does not enter a market in order to make existing workers into millionaires, but to create a monopoly/monopsony where they can gouge both customers and employees, to extract maximum profit. Quite often, the goal is not even to run the market sustainably, but just to produce optical profits for a quick resale.
A few local contractors may get bought out and become millionaires, but everyone else will be impoverished.
We can probably even predict some next steps. They will recommend and lobby for various 'safety' regulations or certifications that would be difficult for smaller shops to meet, and then pressure commercial landlords, housing associations, etc to require those certifications.