So you're the %^#&)@ bidding against me!!!


...kidding
A couple of final thoughts on acquiring materials - more on the long term, but a few ideas. You'll always need to purchase materials from time to time, but a lot of materials can be acquired cheap and in bulk if you're resourceful.
If you're a hunter, or know one (pretty good chance either way around here) then you'll have lots of opportunity to add to your material supplies.
Every time I shoot a new bird species, I pluck a bird or two, snip off the wings (let 'em dry out a bit) and then store it in a ziploc bag. Besides the fly tying staples like mallards and pheasants, grouse, ptarmies, chukar, other ducks, etc all have unique feathers that can be turned into awesome fish-slaying flies.
Same thing with hunting - shoot a moose or bou or deer or whatever, cut off a couple of slabs of hide (get some long hair off the mane, some side hair, some belly hair) salt it and dry it until the hide's a rock and you've got a lifetime (or close enough) supply. I'm still tying muddlers and caddis from deer and elk I killed a decade ago.
Get to know your local taxidermists - often they have scraps of hide to the fly-tyer's delight. And spread the word among your fellow outdoor enthusiasts.
The coarse hair on the bottom of snowshoe hares' feet has an awesome water resistant oil that makes great dry fly dubbing. Depending on where the bunny's living his feet will have various shades of color - from blue dun to cream. Don't forget the face mask (various times of year yield brown to gray to white in color).
Pine squirrel tails are perfect for muddler wings and lots of other streamers.
Pine marten were almost made for fly tying - from orange to cream to brown to gray they are an amazing source of dubbing, and their tales are top notch for streamers and wings.
Fox, muskrat, beaver, etc. - they're all useful. (Haven't tied a fly with wolverine yet... some day.) Polar bear, arctic fox and seal all are awesome if you can get your hands on some.
I am not above salvaging roadkill on occasion.

PS - I'm a big fan of winter ale. and IPAs. and pretty much - well - beer. They all go well with tying.