I think the key is to decarb it before you do any extraction. That converts all the THC-A to THC so it is psychoactive. THC-A does nothing for you, unless you smoke, vape, or bake it into THC.
And out lovely little “factories” are THC-A making machines, not THC so much. High Times ran experiments and says 110 C for 110 minutes.
Once you’ve done that you can make hash, extract with solvents, make tinctures, etc. I think the difference between solvent extraction and tinctures is that you let most of the solvent evaporated to get oil. With tinctures, you keep the solvent so it better be ethanol, or some edible oil. You could probably do a fine tincture with canola oil and then make salad dressing or mayonaise at the end!