While scanning the available items on Amazon, I came across an industrial 8 channel relay box. The box is powered using a Raspberry Pi Pico, which you provide. All of the connections are covered and it appears that I would not have to do anything but connect wires to the system and to outlets. I could actually get a 4-gang switch box and put four outlets in the box. Over the next couple of days I will think about how this will affect my concerns about UL level protection.