Automated watering setup?

[farley101]

As I am asking above, I'm looking to set up an automated watering system for my outdoor orchids.

I have 40 or so cattleya, some catasetum, and a few dens, bulbos, vandas.

I've been watering all of them on pretty consistent schedules, every 2-3 days as we haven't gotten much rain this summer. A few like the vandas get almost every day watering, but that is the exception.

I am going to be heading out of town for 2 weeks at the end of the month. I want to set up something so I don't have to make the person feeding my critters responsible for watering the outside plants as well.

I am thinking of using the 1/2" irrigation tubing found at the HI store and adding a some 180 degree sprinklers to it. Let it run for x amount of time every other day in the morning and that should hold them over until I'm back.

Is this a feasible plan? If it rains will I risk over watering? Everything is in bark, dries out pretty quickly even with the high humidity we've had lately.

Any input would be helpful, I'd like to cut back on some of my watering time and this seems like an easy way to do so with the current outdoor plants.