Wife and I have been processing our own for a few years now, a few things have made all the difference.
0. Aging
If it's warm I move immediately to quarter and get everything in my freezer setup (info in step 2), if it's cold I'll let it hang outside for a few days and drip. When we used to live in MKE county I would hang it from a tree in my back yard and throw a tarp around it, kept the neighbors calm and protected it a bit. Now I live in the country and it's not a problem.
1. Setup to hang, skin, quarter, and age all in my garage.
I have a lag bolt stuck in the ceiling of my garage, when I get one we'll hang it from there and I set up 2 folding tables. I'll then skin and quarter everything out. Having a dedicated space once I do come in to quarter is big. Throw a cheap drip pan underneath and it keeps your concrete clean, mine's an old kiddie pool we got for the dogs.
2. Cooler
2 years ago I made an aging cooler. Go on marketplace or craigslist and buy a cheap upright freezer. You then buy a temp regulator and humidity regular off of amazon, a computer fan, a small humidifer, and a small dehumidifer. The freezer plug directly into the temp regulator, which turns it on and off to keep it between 35 and 38. The humidify regulator connects to the humidifier and dehumidifier, both of which go in the bottom of the freezer, and keeps the humidity in there in good range. Fan is just for air circulation. This lets you age the quarters for a week, draining the blood and keeping the meat in good shape. Pop it open once a day to rotate everything, but otherwise leave it alone. This thing was an absolute gamechanger for 2 reasons: made it so I didn't have to do everything in 1 day and let me keep meat aged and drained properly. The entire setup should not cost you more than $200 and the freezer is half of that.
3. Processing Round 1
Everything that's smaller and ready to wrap immediately (tenderloins, backstraps, etc) gets washed, patted dry, and wrapped once in plastic wrap and again in butcher paper. This is how everythings gets wrapped, but we do the important stuff first. For wrapping the pat dry and getting air out is key, air and standing water are what freezer burn meat. Pat everything dry, squeeze the air out of the plastic wrap, then don't think too hard about the butcher paper. Haven't lost 1 piece of meat since we started doing this, but we're diligent about the prep.
4. Processing Round 2
Usually a week or so later we'll pull the quarters into the house and debone everything. Big roasts and cuts get trimmed, wrapped, and frozen immediately. All small and misc cuts we do a quick silverskin trim (don't have to be as diligent for the ground stuff), but then everything goes into a bunch of ziploc bags. Those bags of misc cuts gets all the air squeezed out and we save them all for later. At the end of the year we do our own grinding and sausage making, but we do it once after the season because we do it all with hand grinders, no fancy machines. If I was doing more than 4 deer or a couple elk I'd buy one, but no need for one good day of work.
The biggest things that have helped:
- Dedicated space to hang and quarter
- Aging cooler, not only to protect the meat, but to help break the process up into stages.
- 2 good knives: one for boning and one for fileting (and a hackzall blade for cutting bone when we need it). You don't need expensive, but you have to be comortable with them and they HAVE to be sharp. Sharp knives don't cut your hands, dull knives do because they're harder to control.
- Doing things in stages. The initial hanging and quartering takes the longest around 2-3hrs, but after that the big processing and meat grinding each take about 1-2hrs a piece.
- Spending some time learning. Spend a good hour or so on youtube watching tutorials on gutting and processing, it'll help a ton.
Overall you'll have to invest a bit up front, and in our first home space was a much bigger issue, but we did the math and after 2 deer we started saving. Plus, the amount of meat you get when you do it yourself is WAY more, just because you take your time and get all the little cuts right. Butchers don't have that luxury, they have to turn and burn on numbers or they'd never get anywhere, but I can take my time and I get a lot more out of it.
That's my way-more-than-2 cents.