This is a terrible idea... Don't wash stalks/stems, trim and buds in the same run. Stems and trim have a lower ratio of shit you want (THC, CBD, etc) to things you don't want such as chlorophyll and therefore requires a much shorter wash to avoid those "contaminants" and a shitty final product. Buds torn into small pieces by hand with the stems removed will allow you the longest washes possible to ensure a good extraction and it provides a better yield with a higher quality final product. You also have to account for the loss due to the alcohol that is held by the plant matter after the wash which will be greater when washing everything at once. Imagine how much alcohol you'd need and how long it'd take to purge it; longer purging time = more dust and stuff it'll pick up. You can wash all those things, just do it separately for the best product. If I had that much weed I would only make concentrates from buds and cook or make tinctures with the stalks, stems, and trim. Quality over quantity is especially important when making qwiso because its so easy to end up with a poor end product due to the polarity of alcohol.
Nice! I bet that produces some pretty good results. I haven't made qwiso in a few months, its just such a pain in the ass to make compared to BHO; although I vastly prefer the effects of my QWISO to my BHO.