First things first, camo is highly overrrated. Dont let that sway you if thats the only thing you dont like. Part of your problem here is going to be wearing jeans. You need a system, even if that system isnt made up of traditional hunting/hiking gear.
Heres an example of how you could get warm and spend very little.
Buy an outer waterproof shell in your favorite camo thats quiet. This will cover you in any weather, you can pack this in to keep from sweating.
Bottom:
Put on a pair of compression style pants, could be walmarts brand for all I care.
Next layer, find a pair of fleece winter pajama pants, you problably already own these
Add a pair of sweatpants to round out this
Wear that combo till you get to the tree, have the stand hung and are ready to hunt. Now add the shell bottoms.
Top:
Cheap compression layer
Fleece jacket or vest
Hooded sweatshirt
Shell at the tree
My core layers for cold weather this year are both made by hiking companies, marmot and mountain hardware. I have less into both of them than a single top or bottom from a hunting company.