Check out this project on RYOBI Nation - Needed a baby gate for the top of our basement stairs. I took out the existing basement door, and placed a 29" by 36" wooden baby gate. Made from 1x4 common boards, sanded it down, stained it Golden Oak, screwed it together with 1.25" wood screws, used a gate latch also.
For the horseman on a budget, this run-in-shed-turned-stall is an excellent option. An attached tack/feed room keeps everything close at hand in an area that needn't be more than about 16x12' for one horse.
In an attempt to make my house look less "Playskool Chic", I recently made these No Sew Fabric Baby Gate Covers. And by recently, I mean "way back in July before we moved." I'm the worst. Baby gates are an eye sore, but a necessary part of life at Casa de Kolchak. We've talked about how Felix has some reactivity issues, and
How To Build A 10 Minute Baby/Pet Gate - With this do-it-yourself creations, you will be able to build a simple, attractive, and cheap baby or pet gate.