@Shelley341 if you've already agreed on an hourly rate with your "friend" for her other services, that same rate could extend to the time it takes to transport and wash the laundry. But if she's using her own appliances, you'd have to add a fee to cover the utilities.
It seems like it would be far more efficient if you just paid your "friend" to do the entire cleaning. A typical home sanitation cycle can be done while the guest linens are in the wash, so it's a huge waste of money to pay two separate services to do the chores.