*pics removed to make it easier to read.
I only see this working well if the room your fogger is in does not change and the environment is constant all year around, sure you can adjust the timers depending on the time of day and season etc.
Personally I will be going for environmental control, so I don't have to tinker with timers to fall in-line with what the room environment is it, plus I feel it would be easier and cheaper in the long run.
Yes, you are correct there is NO off-the-self solutions with what you (and many others) are attempting to do...HOWEVER, as we know there are
toys devices which we can used to build our own solution to monitor and adapt to our requirements.
I am opting for pre-build power switches like this:
https://www.pishop.ca/product/iot-power-relay/ controlled by an IoT device with inputs from RH and Temp etc, this avoids having to rewire and play around with power cables directly, a lot safer in my books.