You can save money by curbing your impulses. Even though you may want the thing that you want this very moment, it may not be the best way to save money. Is the item really necessary, or simply something you could do without (e.g. “Do I really need another halter and lead rope in a different color?”). If you in fact do need something, do some research and find out the best way to spend your money. While considering the base cost, also look at quality, longevity, and any further discounts that may be available.
And as always, never try to cut corners at the expense of your horse’s welfare.