In my eyes here is the steps I would take on a limited budget.
Wind is most important. (and free!) If you have scouted and know the direction the deer come from only hunt that area when the wind is in your favor.
I use all the scent elimination products, shampoo, shower gel, deo, spray, laundry, etc. BUT if I had to choose just one to get it would be the Scent Killer spray. Here is why
Shampoo is only good for my hair, soap is only good for my body, deo only for my arms, (you get the idea)
But with spray I can use it anywhere. I can spray my clothes, my boots, my treestand, equipment bags, hat, etc. I can cover more areas with the spray then I can with any other single product.
Go ahead and figure out what your gonna wear that day. Hang those clothes outside, let them air out for as long as you can. Spray them down with your eliminating spray. Put them in a plastic bag or crate. Leave them alone after that until the morning of your hunt. After you put everything on reapply the spray prior to walking in your woods.
As far as camo clothes they would be the last thing on my purchase list. I would be more concerned with being able to hunt safely, with a rifle that is accurate, with the wind in my favor, and my clothes and body as scent free as possible. After I cover all those basis then I would start considering to pick up some camo clothing whenever my budget would allow.
What wma are you hunting? Are you going to be stalking or staying in one location? If I could I would scout and hunt one location. Especially on public land on the opener of gun season. I would not fill comfortable walking around alot with a bunch of gun hunters out on the first weekend of the season. On a crowded wma if you are stalking you will most likely come into contact with someone hunting out of a tree stand. You will possibly mess up their hunt and yours as well trekking around the woods. Plus you have to worry about people that assume you are a deer before they see and shoot blindly. I am OUT on gettting shot at my a 30-06!!!
I hunt TN as well. I hope the tips I listed above help you out. If any of you other hunters feel I am wrong in some area please respond and throw your 2 cents in.
Good luck on your first deer hunt.