It would probably be cheaper to put her in daycare a couple days a week or even just for mornings everyday.. She would still get socialization and then she could come home for her nap and you could get a full days work in. Full time daycare in my area is an average of $40/day so if you brought a nanny in for 4 hours its going to run you $48/day going on what the pp said... Plus if your daughter knows your in the house she may want to be with you rather than the nanny and it would be tough listening to her cry for you outside the door