Projector enclosures are a good thing to invests in if you don't want to set up your projector each night and re-align. There are a few key things to keep in mind when looking to make or purchase an enclosure. Weathertight, theftproof, and breathable.
Weathertight: When we say weathertight, we mean if a storm happens to come through, you'll have confidence that the projector will stay dry. Of course these boxes will have openings and vents but as long as the projector doesn't get direct rain or snow, it will be fine.
Theftproof: There are many things that are recommended to help your box from being stolen. The first thing is putting a lock on the door so no one can just open it up and steal the projector. Another one I strongly recommend is Earth Anchors. I personally use 4 earth anchors per box to help it stay in the ground. There are many different kinds you can find on amazon but these will help from someone walking off with your whole setup. Lastly we use window alarms. They go off based on vibrations. So if anyone tries ripping the box out of the ground, taking a sledgehammer to it, or even unscrewing the box apart, the window alarm should go off and trust me, these things are loud and should definitely scare the thief's away.
Breathable: These projectors put off a lot more heat than you could imagine. Simply putting air vents on your box isn't enough and your projector will overheat without adding a couple USB fans in there as well. Also make sure your box is large enough to where there is several inches of empty space all around the projector.