I don't think you're cheap. I think you're realistic. Marketing hype is what sells most specialty gear, not it's actual usefulness. Bowhunting, like any other niche market, adds 10-30% to the cost of an item. So do "brand" names. As you say, surplus camo gear is a lot cheaper, and just as good; if you even feel the need for camo (I haven't since Viet Nam).
Ghillie suits, IMHO again, as simply ostentation, unless you're a military scout-sniper intent on assassinating enemy officers and getting away with it. A completely different task than whacking a deer or elk. People have been killing big game, up close and personal, with bows and spears, for 10,000 years or more wearing just the clothes they were walking around in.
Boots are boots are boots, with maybe the exception of LL Bean Pacboots. But even then, you can get a cheap pair of Wellington rubber boots that will do the same thing for a lot less. Wool, is wool is wool, and names like Pendelton or Ashbell don't mean squat if you pick your non-brand-name products carefully (long fibers not short).
Same with raingear. I prefer Frogg Toggs (tm) as they actually breathe and you stay dry inside, not wet from sweat. And they're not as spendy as Big Box names like Cabelas or Bass Pro.