No problem, really. I water with a lance through a fertiliser dilutor giving 1/100 of the mix at every watering. Not too much bending!
Worst bit is when the plants are at different stages, & some don't want fertiliser.
I suppose they get from 3/4l - 1 1/2l a day - each plant, depending on weather.
Biggest problem, which only dawned on me last night, is how the hell do I arrange all the support strings.