Keep in mind that quality, cost and sustainability are often interconnected, so that when one goes up, so do the others. That means that choosing quality over cost is, more often than not, the sustainable choice. This is because (at least in our business) choosing a high quality, long-lasting product means eliminating the need to replace the item and therefore reducing waste. We also make sure the products we recommend are sustainably sourced and of course non-toxic to the environment.
Ultimately, focusing solely on price and choosing the cheapest option in order to stay within a certain budget can come at a cost. Sure, the immediate cost of the cheapest product could be less, but if the quality is bad and it needs to be constantly repaired or replaced, it will most likely end up costing you more.