You asked about "cleaning, doing laundry and meal prepping."  The area where clients (children, seniors or disabled) are present certainly must be cleaned, so include those with the hours when they are there.  Laundry -- is there a separate room?  You might have to calculate that area separately.  Likewise, with kitchen.

Make sure the taxpayer is licensed (or doesn't need a license). Otherwise, not eligible for any deductions.