I think the trouble is when someone starts out by saying I NEED all this stuff, and all in one color before I buy my horse, well no you don't, there are a few things you will NEED, but lets face it a never ending list of items that we want for our horses, and there is a huge difference between need and want.
The list that the OP has is very extensive, and most of it is like to have, rather than need to have, certainly don't need to have before you even have the horse. It's hard enough shopping for a horse without trying to make it fit everything that you have as well.
I truly understand the excitement of buying things for a horse, hey I have several but I already have a list of wants for my potential new horse, but I'm not buying anything until he is home here and I can check his measurements, I hope I have a bridle to fit, I know that my polos will fit him, not sure about any boots or blankets that I have here, we'll see. Money is just to short to waste.