Emphasizing BUDGET, you can do pretty well with a surplus molle ii rucksack & frame (approx $90) - or just the frame + shoulder + waist straps (approx $60) on ebay. You'll be trading "bestest, most comfortable, lightest" for "cheap". I do it, and it works. Kifaru snobs shun me.
The large rucksack will hold your cold weather gear, deer paraphernalia, etc. Plus your shorts and flip flops and mother-in-law or a quartered deer and has compression straps to get as small as possible. You can easily find about 4,000 molle or frame points to lash sticks, platform, etc. to it. Empty, that setup weighs somewhere around 9lbs, which is quite a lot compared to Kifaru, etc... but you can afford it.
2 other options: Get the molle frame + shoulders + waist setup (~$60) and:
1. add a surplus 3-day assault pack (approx $45). You'll have to finagle the assault pack to mount on the frame, but you can. You can lash sticks/platform to the bag/frame. Doesn't solve hauling, but is a smaller, probably lighter bag. Looks like it'd still carry cold weather layers and deer gear with room to spare. The rucksack is cavernous by comparison.
and/or
2. Get a Wilderness Packs Handi pak (
https://www.wildernesspacks.net/product-page/handi-pak approx $30) and that will connect to just the frame, and works as a meat hauler. Is not a bag, so you won't be carrying mother-in-law + cold layers + leftover pizza in it... but it will haul just a mother-in-law or quartered deer. Or a whole deer/mother-in-law depending on size/orientation.
I have the whole rucksack+frame and handipak setup, and I'm probably going to get an assault pack to combine with the frame + handipak and ditch the ruck. May save weight, probably will save random dangling/irritatingly uncontrolled straps everywhere. All in still under $200.