We have the possibility of getting our first major commercial contract. The contract covers the maintenance for 50 condos. I am trying to figure out what my bid will be and I need to factor in the cost of pine straw maintenance. I am wondering how often it should be changed per year. Also on a side note, I will take any advice as to whether or not I should consider convincing them to maybe go with mulch instead. Is it more cost effective in the long run? Does it protect against weeds better? That sort of thing. I'm not sure if they are stuck on the pine straw or not, but it would be nice to go in there with some ideas for them.