How do they know what it should cost?

Installing HVAC ducts in blistering hot attics is backbreaking work but people can be found to do that.

I wonder what those people get paid, and whether they have access to bathroom breaks, clean drinking water on the job, and a decent place to sleep at night?

Maybe if they increased the wages or improved the working conditions, people would come do the work after all?

Just spitballing, here….

Thank you, this is useful advice