Are you local or of Chinese ethnicity? Doubt these folks would want someone poking through their belongings.
I'd probably pivot on this idea and throw in an emotional twist to the service - say things like organising your kid's learning area and teaching them how to stay clean & focused etc ... Find some test cases where the parents can give you some glowing reviews...focus for low income levels for a lower rate
"After Chekki organised my kid's study area, they passed their exams with flying colors and got into Cambridge..."
"Better than Marie Kondo..."
I feel there is little or no value add to just "decluttering" ..