Mixed-Signal ADC/DAC Circuit Design

I am building a board that needs a compact mixed-signal section dedicated to high-accuracy data conversion. The job is to design the entire ADC/DAC front-end, marrying the sensitive analog path with the supporting digital logic so the output is ready to drop straight onto my main PCB... (Budget: ₹600 - ₹1500 INR, Jobs: Analog Electronics, Electrical Engineering, Electronics, FPGA, Microcontroller, PCB Design and Layout, PCB Layout, Simulation)