I could not go through with things like the Ferber method. I think it will be fine when you are not there - both my children manage when I am at work even though when I am there they need to nurse to sleep.
Then one day, maybe in a few months, your daughter will sleep without nursing even when you are there.
As fir the nights, I stressed about a similar problem for 2 years, then lo and behold after about 2 and a half, my son started waking only once in the night at 4 am, and then a while later stopped waking altogether. It was tiring but looking back it was worth it: he needed that comfort, and it was a short time in my life but an important one in his.