The best auto watering in my opinion is a Blumat system specifically the Tropf Blumat system. Can be set up to run indefinitely without supervision. I have mine connected to my house plumbing (or you can do a reservoir)and I love it and never water. I also have limited time around work. More importantly in living soil a constant moisture level with less dry back is important so the continuous watering is an advantage as the system is self regulating for moisture level.
It’s not without draw backs, any auto water system can fail and flood one connected to your plumbing can flood indefinitely so make sure you think of that. I have had that happen a couple times due to operator error, however it has always been confined in my tent.
Do your research there is quite a bit of info out there.
I have no connection to Blumat just a satisfied customer
if you are in the US check out Sustainable Village as they are the distributor and have a tonne of info and stuff