I used a Rittal plastic enclosure. Like everything else, it seemed a little over the top, but by the time I looked at alternatives I was only going to save at most $50-$100, and for the niceties of a Rittal panel I figured it was worth it. Glad I did, as it's in plain sight, looking halfway decent is a good thing, stops my garden looking too industrial
Thanks! The wife and I are floating the idea of an automated aquaponics setup, so I thought I'd get an idea of where to start with the controls cost estimate/planning.