My stuff is going to medical dispensaries so it has to be free of all insect matter
I'd prefer a couple of microscopic predators of my med weed than any chemicals!
The best way to maintain a bug free grow is by having a fully working organic garden where the plants have all the nutrients and vitamins they need in the soil. Deficiencies of humus (the dark rich soil) will leave plants without their proper resistances.
Monoculture (ie just weed plants) means that your whole garden is susceptible at the same time to an infestation. Proper organic gardens (ie permaculture method) interplant so predator species can thrive and a whole ecology can be in balance.
A good plant to ward off pests is dwarf marigold, but this is moot if you don't also have the above ideas in practice.
Also in PNW you have a lot of powdery mildew and my above notes prevent that by providing the plant with its correct natural nutrients.
If you are going to buy predators, ladybugs wont fix a problem, they will only help prevent it. There are a couple of other predator mites that eat two-spotted spider mites, and they are a better solution than ladybugs once a problem is evident. But you don't buy them until you actually have a first sign of spider mites because they are shipped with spider mites as their food source.