i have a customer that i mow for, and they are talking to me about how they want landscaping done, but all the contractors they talk to have a waiting list, 3 weeks just for a plan, no instalation till fall. My drawing skills are poor, nonetheless, i'd like the instalation job. i'm thinking of putting a rounded bed in their front yard and some trees in the back yard, maybe a patio? I will be honest with the customer, and i'd like a shot at it. what do I need to make a plan, i can get the drawing equipment from school. oh, and the house is on a hill, the top being towards the back, there are some drainage problems. there is an existing 2 foot brick retaining wall. i'd like to use a trencher and dig a drainage tile to go in on the down side of it, piping it to the driveway/street drain. i'm afraid though that i could destablize the retaining wall, and thats big money/liability. what are your suggestions?