The most economical way to achieve maximum impact with Southwestern home decor is the color of the wall. Paint the four walls of a warm earth tone or imitation finish mottled yellow or accentuating highlights a wall in a bold tone. Try red or deep orange rust. If you prefer neutral walls in pale brown or old white, add Southwestern style templates. Try a line arrowheads, cactus, snakes, swirling abstract stripes or squares to achieve an indigenous aesthetic. The murals are an economical way to cover an entire wall with a picture of the Southwest as canyons, caves and desert landscapes.
The good news about the Southwestern home decor is that decaying and antiques are at home. Your actual furnishings may only need a cosmetic update to give an appearance of the Southwest. For example, a normal sofa you add texture with a wool blanket in jagged lines or diagonal gray and beige stone.
A bed frame wrought iron achieves a charm with a thin layer of lime old can scrape to reveal pieces of metal through. A wooden bookshelf, cabinet, closet or table exudes a rustic handmade and Southwestern home decor with a small and intricate painting or stamping or templates or terracotta edge against a cobalt blue rim edge.