On any budget, you can improve the look of your tailoring.
Make your outfit an outstanding one
Buy conservative - If a suit isn't of the greatest quality, make sure it doesn't bring attention to itself in any other way. So buy single-breasted, notch-lapel, 2 or 3-button, plain grey or navy suits. Bright colours or patterns might seem like a good option for a cheaper product, but they will only highlight poor materials.