Ideal number of people to look after a baby

1. Person 1 = Mummy - pump milk 
2. Person 2 = Mummy's mum - cooking or any miscellaneous tasks etc
3. Person 3 = Mummy's mum-in-law - help to look after baby
4. Person 4 = Helper - to do household chores/cleaning & washing

Person 2 and 3 can rotate when mummy is pumping milk and there is always one who can take a rest at any point in time (unless any super big emergency the baby needs 2 person attention). 

So to me, 4 person is the ideal number.

Of course, person 2 and 3 can be someone else, preferably someone you know well.

It's only me, myself and I + my mum for now.

I wonder how my mum cope when she is alone with yx after my maternity leave ends. =\