The average cost of living for an American [edit]. 1  $20,194 per person per year according to Bureau of Labor Statistics (value given divided by 2.5 average household size ('consumer unit') - [1].
Their annual salaries vary according to industry and place of employment. Concrete finishers made a mean annual $39,370, with the lowest-paid 10 percent earning $23,180 yearly, and the highest-paid 10 percent making $62,600 per year.
I would start with figuring what you need to make per hour or day, and go with that. This way, your being paid what you need whether the job takes 2 hours or 2 weeks. As Teetor said, I always try to get at least $300 per man per day to cover wages, taxes, insurance, overhead, yada yada yada.