None of this should impact watering habits, which tells me you are not watering correctly to start.
1) fully saturate
2) wait for heathy dryback and repeat.
That's it. Nothing special about irrigation or nor sophisticated processes etc.. Definitely don't whimsically choose the volume to give. You give the volume to accomplish the task. If you wait for a similar dryback each time, it will require a similar volume you can predict and plan for.
So, the question is how long is the duration between irrigations? It gets successively shorter each cycle as it grows into pot, so take that into consideration. If that length of time is shorter than your absence, you will need someone or something to water your plants.
As far as fertilization.. as you normally would, too.. this depends on how strongly you mix your fertilizer... every other? every third? Added once a week? All of these 'can' work when done properly. Use more deductive reasoning than inductive.. top-down reasoning leads to avoidable mistakes.