Ok, need to make an island about 12X5 in the middle of a customer's front yard. I have only done maintenance on existing beds so kind of need help on how to charge and also some pointers to get the job done as efficient as possible. I started out doing lawn maintenance but have quickly gotten into the landscape aspect...no expert but a hard worker and always very particular about my work. I would like some tips from the pros with experience...anything helps. Thanks.