Option 1. Green clean or mighty wash, follow the instructions, treat & trash bag the plants for 12 hours while you clean the room & done.
Option 2. 50 gallon tote, dunk all your plants in a neem/water or iso mixture, hold underwater for 3 minutes, bag the pot so you don't drop soil everywhere and pray the lactic acid doesn't kill you lol.
Option 3. Gas the entire plant in a trash bag of dry ice.
Honestly, mites aren't that hard to get rid of, a huge grow op would be a different story but a 12 x 12 room is easy.