Could be wrong, but I think Benefect Decon 30 works on scabies. Call them to confirm . I’d go in with a tyvec suit, shoe guards , 2 gallon pump sprayer, spray EVERYTHING, including carpet, walls, furniture, beds, etc. then start at the beginning with decon 30 as my prespray, spray in, wand out, dump the tyvec suit on site into a garbage bag, and spray any and all equipment with decon 30 on site when done.
Get back to the shop, do a full hot wash/ decontamination of the van and all equipment.
Charge accordingly, but honestly? It’s a HARD PASS for me personally.
They need to buy a gallon or 2 of tea tree oil shampoo, and a couple gallons of bleach, and go to town on cleaning the house, and using the shampoo to bathe for a couple weeks…