How often water or flush plants in s/h?

[NYCorchidman]

I am getting tired of spending too much time watering my plants so I've been thinking of trying a few plants on s/h, then eventually all of them if successful.

I thought it was more like sitting plants in water at the bottom and fill that up when dry, which will take roughly about one week, thus reducing the frequency of watering, but I keep reading about this frequent washing of the medium to avoid salt build up and bla bla bla.

If I have to wash the pot so often, then there's no point for me to switch to s/h.

Help me!!!

Also, recommend me some good vendor to buy kits from.