Wigwam Motel in Rialto
The other (next to Holbrook, AZ) surviving Wigwam Motel is located in Rialto/San Bernardino and the mailing address is Rialto, San Bernardino's neighboring town, which is adjacent to the property line.
This motel, too, had seen worse times when it functioned as a love hotel, but it has since been completely renovated.