We moved a couple of weeks ago and needed to get a shelter up fast for Esta and Minuet…only had a few hours to get a shelter up before a monster storm system hit the area. We hand dug 6 holes (3 feet deep) and set treated posts, then attached boards. We secured the carport cover to the posts, and ran some twine over the top of the tarp to the bottom of the boards just to be sure the tarp stayed secure. Storm blew through, shelter held fine. Easily fits 2 horses, maybe 2 and one could get his head and shoulders out of the rain (if everyone’s cooperating).
The horses like it because it’s light inside the shelter and they have a 360 degree view.
Cost: about $350.
We bought new lumber for everything; you could get creative and go cheaper if you had to.