outdoor hydro?

Look up hempy buckets. I think this is the most basic hydro set up and can be applied indoor or outdoors.

I hope you realise an outdoor set up would be a long term thing as flowering would only be triggered as the light source (the sun of course) changes.
The beauty of indoor grows is simply the ability to artificialy trigger flowering when you want.

actually outdoor force flowering is very possible...as long as you cover the plant with a large bucket, or tarp or whatever will provide complete darkness during the day, you can force flower a plant outside.