Watering System for Patio Orchids

[D&S Mabel]

I am not sure exactly where to post this but since, even after an number of years of trying to grow orchids, I still consider myself a newbie, I'll try here.

Below are pictures from a couple different angles of my back patio. We have been doing OK with our orchids but I have been thinking lately of adding some type of overhead irrigation system so that I don't have to unwind, drag around and then rewind a hose each time I want to water the plants. I would really like to just turn a lever to address this chore which would leave me more time to putter with the plants themselves.

We have 30 - 40 vandas and a mixed bag from there with cat types, dens, oncs, you probably name it for a total of about 240 plants.

I am thinking that I need to run the system along where the roof eaves meet the porch support posts and the watering coverage area needs to be about 4' -5' wide by the length of the eaves (two runs of about 25' - 30' each) - we have plants hanging and kept underneath the length of this run.

I've started looking at micro-sprinkler heads and systems because of how narrow the watering area is but I am just not sure where to go with this. I don't want to sink money into it and find that it just doesn't work (in that it does not water the area I need or is uneven, etc).

I would appreciate any info / feedback / examples / thoughts / web info on the subject. If you've done the same, pictures would be a real plus.

Thanks all!!!