horticulture consulting sydney

I am in need of experienced horticulture consulting in Sydney, specifically for landscaping. I already have design elements in mind, but need a plant plan : which plants to put where, given the constraints and design intent. Area I need consulting for 4 of the zones marked up on the plan. Ideal advisor must be knowledgeable and experienced in horticulture and landscaping, with a strong knowledge of Australian plants and Sydney conditions. Budget will reflect the complexity of the project and experience of the person. Remote advice possible - will provide photos, dimensions and current thinking. Welcome to site visit in West Pymble. Hand drawn plan and plant list perfectly acceptable, so long as it considers intent and constraints.