I don't do much sod work but I have patched a few areas here and there. I have a guy that wants me to sod his whole lawn its about 5K sq.ft. and he built his house last year and now his lawn is mostly dirt and weeds. If I decide to sod it what would be the best way to get rid of the weeds before layig out the sod. I can get the sod at wholesale but what should I charge for installation ?