Get out and do some backpack camping around home. This gives you an idea of everything you need to camp in the backcountry and how much its going to weigh. Then when its time to backpack hunt you just add your weapon, optics and kill kit.
So much this. Go live out of your pack, close to home, for a few days.
Everyone's said it but it bears repeating: boots. Try before you buy, for sure. I'm still in love with my Lowa Tibets after 2 years, but they're not for everyone.
You can grab a used 2014/2015 Exo 5500 on here for a bargain price & it'll last you forever. I can do a solid 10 days out of mine.
I'm still using a Golite SL5 as my shelter of choice. They're out of production now, but they are being made under a different name (I forget what) & they're really good value for money. Heavier than some & a few dollars more than some others, but what price comfort?
Speaking of comfort.....don't penny pinch on a pad or bag/quilt. Been there, made that mistake. The only thing that'll kill a hunt as quickly as ruined feet is no sleep. Thermarest have set the standard with the NeoAir range. It's money well spent.
I'm a quilt guy myself, but they are spendy.
Boots aside, between now & next year, you'll be able to pick up everything you need here in the classifieds, on budget.