how mature your plants are will determine how much watering will be needed. as far as lighting goes if your plant lighting is set up with a timer, then accurate lighting will not be a PROBLEM.
Very difficult...depends on the temp and the size of you're plant...i went away for a long weekend and just got back in the nick of time to save mine......before i went i watered her till she was seeping out the bottom and she still dried out.....Peace out....Sid