I've got it...
1. Go get yourself an electronic screwdriver or drill, some string, a wine cork, a corkscrew, and an empty bottle that can hold the full amount of water you want to be poured in (and can be corked.)
Add in your water/ nutes and put the cork in just enough to stop the water from spilling out when the bottle is turned over. Now screw in the corkscrew and rig up the bottle upside down on the side of your pot just above the soil so that if the cork is pulled, all the water will spill out into the pot.
Tie a string to the corkscrew, and then tie the other end of the string to the your electronic drill or screwdriver, so that when the drill is turned on the string will be spun up into the drill, thus pulling the cork off your bottle, thus WATERING YOUR PLANTS.
Rig up timers on the outlet as I explained in the last post so that the outlet your electronic drill/screwdriver is plugged into will be turned on when you want your plants to be watered (in 3 days). Tie/ tape the "trigger" of the drill down if necessary and do a test run. Hopefully, the drill is turned on by the timers when you want without having to touch it. The drill will wind up the string, hopefully pulling the cork out of the bottle above your soil, spilling out your nute solution. All while you are gone.
BOOOOOM I'm prouda that one lol