You can make your own raw powders, but good luck with that. If your going to invest all the money needed for a legit lab, you may as well become a source yourself. You can test the raw powders you would receive from a source. There are many methods, some you can do at home. I won't go into details, because I'm not an expert; but you can find what you need on the internet.
You never know what your source is getting until you try it. No different than "pharm" grade that turns out to be fake. Some fakes are even decent. I used some "fake" Parabolan many years ago, that looked almost real in the ampule, but when tested, it was Tren Ace, not Tren Hex; and was almost 100mg/ml. All in all, it wasn't a bad "fake". I ended up buying quite a few more of them actually.
Most raws are being produced in China, so just like anything Chinese, some is good, some is decent and a lot of it is shit. A few other Asian countries i know of have raw labs as well. India has another. I know of at least 3 in Europe as well.
Most raw powders we are interested in are actually "easy" to make and "cheap". Move to China and set up shop.