Oh! 2K is very expensive! But by all means, if it works go ahead. Especially if your children love it.
Just something to consider: I used to have an after school nanny, which was actually a cheaper option. She played with my son, cooked our supper (and tidied up the kitchen), and took my child to clubs and play dates. She wasn't great with homework so I did that after supper.
My son absolutely loved her. All for £10 per hour, 3 hours a day from school pick up till I was home. I did it 3 days a week and it was heaven. Took all the stress out of my day. She was always happy to stay for babysitting if necessary, or come a different day of the week if needed.
I am sure those sort of angels are heard to find though.