Last year I've seen project that used two RPis for somewhat simple industrial automation task. After I pointed out that the whole thing is huge overkill the original author did some optimalizations and redesign which resulted in design that still had two RPis, with one of them being used as one bit 3.3V logic invertor and nothing else.
Needless to say the whole thing was replaced by single ~$20 chinese FX1N clone (which also neatly solved how to drive 24V industrial loads from RPi/Arduino/ESP...).
For this kind of problem you don't want breadboard. But on the other hand board with ATtiny, 12bit PIC or smallest MSP430 and few relays and optocouplers would solve the problem. And on the griping hand random chinese PLC exists and does not involve few man-days of NRE involved in designing such a thing.
Needless to say the whole thing was replaced by single ~$20 chinese FX1N clone (which also neatly solved how to drive 24V industrial loads from RPi/Arduino/ESP...).