Using a 13.8 VDC 30-50A switching power supply on a 15A house circuit
At a rough guess, the radios will each draw under 5 Amps while transmitting (and well under 1 amp while receiving.)  With both transmitting, that would be 10 Amp at 13.8 Volts.  The power supply will draw a little over 1 Amp at 120 Volts, so there will be no problem powering the system from a 15 Amp home circuit. (and the power supply you suggest is overkill for the task.)