Which gear should I prioritize?

[Thinkingman]

Here are the things I've seen ruin hunts....boots, binos, rain gear and tents.

Pretty easy to keep rolling with a Win .270...if it's not broke, don't fix it. I'd spend a bit and stick a decent scope on it in good mounts- about $250ish will get you there. Hard to go wrong with a VX 2 or even a Nikon or Burris.

Binos....if you can spend $400-500 you can get a very serviceable pair of binos that will last your lifetime. Pick up any old $99 rangefinder if you need one- no need to range 1600 yards if you're not shooting over 300. If you're in timber, you might just skip it altogether since you'll rarely shoot past 100yds.

The world is full of decent packs, you can spend a lot or a little but you can find a perfectly serviceable pack for under $500.

I also agree with this post.
Boots are your number one concern. If you're in flatland Florida, find a ditch to walk as a sidehill hike and you will learn if your boots(and socks!) are your friend or not.
Binos are the second most important item. Everyone's eyes are different. What looks great to me might be mediocre to someone else. I really like Nikon and Zeiss Conquest binos. I do not like Vortex. Just me. But spend some time behind them before you get to CO. Learn how to adjust the diopter. Spend hours. Eyestrain headaches can ruin a hunt just like blistered heals. I did an elk hunt a week after getting Lasik surgery. I had raging headaches due to my eyes not being adjusted yet after the surgery. High quality used binos are a great place to get started.
I do not feel the need for a spotting scope.
A good, used pack is fine. Get it way before your hunt and use it on your hikes....with weight in it.
Rifle scope is extremely important. You may find animals with your binos but shooting them in fading light and putting the bullet exactly where it needs to go is critical. Wounding animals is never fun for an ethical hunter or the animal. We, as hunters, owe them the most painless experience we can. I use Burris and Nikon and have total faith in them. I own exactly zero Leupold products due to the frequency of them failing(and getting replaced with that wonderful warranty).

I can and have slept in the cab of my truck on hunts. Woke up feeling fine and ready to hunt. I tent camped late archery last year, Nov
25, in low teens snow, and my middle of the road bag and pad worked fine. Don't see the need for big dollar gear there, and you can likely rent top quality from REI or other stores, or borrow a quality pad and bag.
Enjoy the experience.
You will have a much better idea of what gets used and what takes up space after your first hunt.