The rate can vary a lot.
Once I registered with Meath childcare as I wanted to mind children in my house. Got called from mums who were offering around2.5/hour as it was from 7.30am until after5.
It didn’t worth it for me.
People will pay more if part time than full long day (they’ll expect to pay less a childminder than a creche, and have the same opening hours….
I think it’s fair to ask 4/5 per hour, otherwise if you work a whole day with all advantages and disadvantages of childminding, if you don’t make a living you will soon decide, it doesn’t worth it.
Talk to the mum, and see what she has in mind, ask as well about her holidays, and yours.
On this website some mums are professionnal childminder, ask them.
Best of luck.
Fabienne