Most of these guys arent paid just by the hour. Many of which are
done by getting a days pay.

I have seen carpenters get around 250 - 300 for the day.

Take that number (lets say 300) divide that between 8 hours
and you'll get 37.50 an hour.

The'll take that money for the day whether they work or not.
You generally dont want to pay these guys based on per hour
then you really have to be on their asses get get **** done.