I built my own for similar reasons.I have yet to find a humidifier that does not need to be manually restarted if power is interrupted. I would love to use my inkbirds to turn them on and off automatically but cannot because they won’t restart when power is restored until I push the on button. Inkbirds work great on the dehumidifier side of things.
Little tub with a floating disk that holds ultrasonic fogger disks. Float valve coming in. Set it and forget it.