I've been using Orchid fertilizer and a garden 2 gallon pump sprayer but my
addiction has far exceeded its capabilities. So I'm wondering if something
like a hose end sprayer like ortho makes would work. The problem I see with
that is getting a proper mix. I'm open to ideas to fertilize a lot of
orchids in a short amount of time.

Orchids that I have are Cattleyas, Phalaenopsis, Oncidiums, Dendrobiums,
and a few other odds and ends.

By the way did I mention cost effective? (cheap)

Any good and easily workable ideas are appreciated