PCB design for 0 to 50 kv HV generator

Need to built for PCB design for 0 to 50 kv HV generator for powder coating gun. Must Not have features - Design should not have Flyback Back transformer,Ignition coil -Design should not have SMD components Must have features - Design should be robust - Design should be connected to 230v system - Design should be with Through hole components - Single layer pcb -portable as possible