Right now I give all good soaking once a week, on Saturday. As they soak, I examine them for pests too. After they have all soaked I fertilize them (except for the last Saturday of the month, when I just use plain water). They all get the same fertilizer except those in bud/spike/bloom...which get a bloom booster.
During the week, I check the smaller orchids, mounted orchids & those that like moister conditions daily & water if/when needed.
I have about 55 orchids now, and if my collection keeps growing, this will get harder in the winter (summer is pretty easy even though they have to be watered more often, as most live on the patio & I just water with the hose, and don't worry about where water goes).