Focus your money on a sleeping bag/pad, shelter, and pack. I'd venture to say footwear should be at the top of your list if you don't have that figured out already.
I've got a Western Mountaineering bag rated for my expected lows, that was where I splurged because I'll have it for the rest of my life. I use a $20 down quilt from Costco and some extra base layers down to about 45F-50F for my hammock in the summer. It weighs 14.6 ounces.
I've got a $30 Klymit pad that's 19oz. I'd like to upgrade to a 12oz pad like an Xlite next season, or I may do a 3/4 length inflatable with a ridgerest so I have something to sit/lay on that's multipurpose.
You'd be hard pressed to find more bang for your buck than a Mountainsmith Mountain Shelter. There's lighter options, but you'll spend a lot more and some of them won't be nearly as durable. When I'm not expecting nasty weather/precipitation, I just bring a ~7' flat tarp that I pitch with my hiking poles/trees/rocks since I really just want it for shade. It's faster, smaller, and much cheaper than a full blown shelter. I sleep with a mosquito head net on when the bugs are bad. Hammocks are great if you are planning on being in trees and not expecting cold temperatures. I ditch mine around 40F at night or if I'm expecting moderate weather because they're just not weight and cost efficient. I love having a hammock to glass from or take a nap in on a hot day though. Mine always comes with me on scouting trips. I usually bring a foam ridgerest or a down underquilt, depending on the conditions. An inflatable works too, but they detract from the comfort for me usually.
Pack is subjective. I'm using the same Osprey that I backpack with. My knees are not interested in carrying more than it can handle when I'm solo in a remote area.
After that, scrutinize your stove/cooking setup and your food. My food is around 125 calories/ounce and about 110 calories/ounce as packed in daily gallon freezer ziplocks. I've got white gas (I've got 4, but my two Sveas are by far my favorite), alcohol, and canister stoves that I choose based on the individual trip. I'm usually not carrying more than 16 ounces/person for my cooking system, including fuel for 5-7 days. I prefer the Svea if cooking for multiple people, or in harsh conditions because it's fast, reliable, and cheap to fuel. Split between two people, it's lighter than any cooking setup I would run solo.
My clothing is merino blend Costco/Paradox, $30 for a top and bottom baselayer. I wear it as an outer layer in 100 degree heat to protect my neck and arms from sunburn so I don't need sunblock (8.8oz top/5.4oz bottom). Socks are the Kirkland merino trail socks for $3/pair(2.7oz)...everything else I've tried gives me blisters. I've got a handful of stretchy nylon and polyester blend pants in neutral colors that are all $20-$30/pair(12.8oz, Wrangler). $20 fleece quarter zip from just about anywhere(7.7oz for my REI one I just bought). I wear $10 boxer briefs from Walmart (3.1oz). Puffy jacket is 650 fill from Costco/Sierra Trading Post/Amazon for $30 (10.2oz). I haven't found a rain jacket I like yet that's under 15 ounces, currently is a Sportsman's Warehouse packable jacket I got for $50 and is 14.4 oz. It doesn't rain here much though, so a lot of the time I just carry a 2 ounce emergency poncho that's like $1 from any sporting goods store. Oh, and a 3 ounce polyester boonie hat that has a neck shade to protect my face and neck from the sun. This covered me for three seasons in Alaska with the addition of some stretchy Helly Hansen pants for hard rain, and I typically leave out the puffy, bottom base layer, and rain jacket for much of the year in Northern Nevada. Calling wolves in Alaska in the winter down to about -5F, I just switched out the merino bottoms for a pair of fleece bottoms that were actually just a hair lighter. I switched to a much heavier down jacket after that, or went to a full Refrigiwear suit most of the time. My hands are usually too hot, but below about 20F I would wear the Atlas Thermagrip gloves that I used for roofing.
Totals for all my clothing, including what I wear in is $166(59.5 ounces), $216 (74 ounces) if I bring the rain jacket.
I'm 5'10", 165 lbs, 32"x32". I wear a medium in just about anything that is sized properly. I budget about 2200-2700 calories a day depending on the conditions. Sometimes I have trouble eating 2000 cal/day if it's hot and I'm working hard. From hunting and working construction in Alaska, I learned about myself that I'm typically happier if I budget extra food to deal with cold conditions. An increase in 1000 cal/day (about 10 ounces for me) will make me feel like its 20 degrees warmer, and I'll be happier if I'm stuffed all day. I have a pretty high metabolism, and this was really apparent when it was around 35-40 degrees and pouring rain all day.
