Having a horse costs a lot of resources, both in time and money. There is a sea of different equipment that you need for both horse and rider to feel good. This includes everything from harnesses to riding helmets to saddles to halters plus a whole lot of other things. These things are necessary to ensure the well-being of all concerned. If you do not have the caring tools for the horse, you run the risk that it will start to slip, and if you choose to ride without a helmet and get into an accident, it can go really wrong.
To be able to afford all the necessary products, it can be a really good idea to look for riding equipment on sale. These products are at least as good as those at full price. The difference may be that it is last year's model you buy, but with this you can save a lot, and thereby have more money available in the end.