I'd be careful of just thinking you can just make your own gear and a calculator will make it accurate.
Here's the issue, those calculators tell you to leave the powder weight at .75 to .85 but most just leave them on .75, but each hormone and each ester has a different weight and melting point etc, so most people making gear have no idea how to figure a powder weight, the convert 100g TE into what's supposed to be 400ml and end up with 450-500ml. So now you don't have accurate dosing.
There is a lot more to know than just the basics posted on sites. Different oils have different temp ratings and you should be very particular about keeping each raw at a specific temp for a specific amount of time, then filters, pre filters, sterilizing the containers, media bottles, vials, and having a lean environment.
Really one the air touches anything it's technically not sterile, so access to an autoclave one the product is finished is best. There is a lot more to know than most think. That's why you end up with painful gear, high or low dosed, crashing, hormone swirls, etc.
Yes it's a good thing to have control over these things but from the questions I see in general about hear use, most people have no business making gear. Mask, gloves, hibicleanse, bleach or Clorox wipes, exhaust fan, and multiple other items should become standard to you.
Don't get into selling it either. It's one thing to make some for personal use, but its a whole new world when you start to sell it and its a road that's best not traveled. If you make a mistake or get in a hurry or lazy like most, you will end up giving guys infections.
Making it into a product you can inject is simple enough that a 12-14 yr old could make it. But to make things right, well I can tell you right now half the labs out aren't doing so. I'm not trying to discourage you but it a huge risk importing raw, and even bigger risk finding a decent supplier, most who are sponsors aren't good, get behind etc. actually I'm glad to see that one of the guys a sponsor here uses went private. Private is the only way to go but trust me, it's not like if you have a couple bottles seized. If you have raw seized, someone is coming to visit, or will be monitoring you for as long as they want including your emails, text messages, and bank records/credit repots, etc.
Don't get into selling. There is a forum for this type of thing. Yes you can save some money in the long run, but is it worth it. If anything, get 2-3 items that you use on a regular and are the bulk of your cycles so you have enough to last you years at a time. Then just pick up other items from a ugl.
Like TE is always needed so 100g, deca you could do 50-100g, then tren a 20g will make 200ml, Anavar (var) 10g makes 500 caps x 20mg, dbol get like 50g, 20npp, or whatever you use.
But what happens is guys start selling to a couple friends, then it just grows from there. I did my thing back in the day, but I never got into dealing. I'm all for saving money but if you have a wife or kids you don't want that kind of attention around your house.
All that said, it doesn't take a rocket scientist to make a good product. For personal use, the germs in the air are yours anyway so it won't be an issue. Don't skimp on sterilizing items like media bottles and vials. I had a buddy who would simply boil then saying that's what he use to do with his kids baby bottles, lol, things going into your stomach and intestinal track are a lot different than injecting. Washing in antibacterial soap then rinsing clean in distilled water, then rinsing inch well in 91% IPA, then baking at 350 F for 35 minutes will due for bottles and vials. But stoppers need to be sterilized, you need a new pin every time you do anything so as to not cross contaminate, new barrels, then things like a capper aren't cheap at all, you might be surprised at how much it is.
Then storing these items automatically shows you are manufacturing, which equals a felony, and you need to know exactly how to store each type of raw and what temps, hen the whole 2/20 Ba/bb is not always right.
It's nice and all but it's also a hassle and risk. Be very careful.