I can understand being short on money... been there, still there! If you have a sprayer, you can spray your coop with bleach water and that will kill the mites. You'll need to get it in every nook and cranny. This should hold you over til you get the sevin dust.
The sevin dust is more persistant than bleach water. (Dont use it on the chickens though lol)
The sevin dust is more persistant than bleach water. (Dont use it on the chickens though lol)