Multi-Layer PCB Schematic Design

I have a project that centres on creating a detailed multi-layer board schematic (.sch). The priority is to translate my functional requirements into a clean, logically laid-out circuit that is ready for subsequent PCB routing... (Budget: $30 - $250 USD, Jobs: Circuit Design, Design Optimization, Electrical Engineering, Electronics, Embedded Systems, PCB Layout, Prototyping, Technical Documentation)