Rough Backyard

[Rescue]

I am new to the business and I have a customer that would like me to "cleanup" his backyard, it is a fairly new neighborhood, and the yard is in great shape. Once you hit where they didn't plant grass in the back is where it gets ugly. Small trees, light brush, rocks, stumps, posion ivy etc... I quoted the customer 50$ an hour. The only supplies I would see I would have to buy is roundup to spray on the living stuff. I have all the tools necessary, can anyone suggest any other method to killing this stuff besides round up, I don't have a spraying license. Should i charge for the chemical(roundup or whatever) or should I just keep my flat rate and hold on to whatever supplies I dont use. Thanks for the help.
Rescue

[desertrat]

Stop charging by the hour, don't do anything you don't have a licence to do. Charge by the job. Figure ALL you cost, add the profit you want to make and bid it.