Cellular IoT RF PCB Design

I need a complete RF-grade PCB layout for a wireless sensor / IoT application that will connect over cellular networks (4G, LTE-M or NB-IoT). The board has to integrate a proven modem footprint plus the supporting RF layout details that keep emissions and sensitivity within spec... (Budget: $250 - $750 USD, Jobs: Antenna Design, Electrical Engineering, Electronics, PCB Layout, Product Design, Technical Documentation)