hand wash or machine?

Magdala • STM. Baby boy due August 2019.

before my son comes I am in FULL BLOWN NESTING and is washing all of his stuff. my mom wants to hand wash all of his clothes and blanket (which he has A LOT OF!) but I was just going to toss them all in a machine with the baby detergent I purchased. Any mommas out there think it be better to let Grandma hand wash his clothes?