sleep deprivation

I feel like I'm living in some punked world. My hubby is ready to have a nervous breakdown from lack of sleep. Our daughter is ready to be given away. Okay that's stretching it but don't think it hasn't crossed my mind. We are lost for words. Here I'm slowly getting better and then bam the daughter doesn't want to sleep anymore. First it was she was thirty in the night to she needed help with the bathroom to she had a nightmare to she didn't want to sleep by herself to down right scream fests when she doesn't get her way in the night. We are being bitch slapped by a 4 year old. We don't know what to do and it's getting pretty old. Kids go through life changes but come on, this is frustrating the hell out of me. I love my sleep and the hubby has a stressful job in which he needs his brain to function. What are we supposed to do? We tried her sleeping in our room on the floor but apparently she thinks we have given her a new playground to play in so we kicked her out. We tried giving her love and encouragement but then she wants more. I've been reading online parenting tips the last few days to help figure out what we can do to help her sleep. We're at our end and with lack of sleep we can't think straight. Tonight we're getting her ear plugs and maybe that will help her with the noises out in the world so they don't scare her. We're thinking of switching bedrooms so her room isn't in front of the house and the noise level won't be as bad. We're grabbing for straws right now and trying everything. Nothing is working....nothing!!! Right now, I'm going to go and drink down as much caffeine as I probably can so I can take care of my kids today. 2 weeks of broken sleep is catching up to us and I think the hubby needs some extra support because he's not taking this very good. I feel bad for him and I want to do something but I don't know what to do to help my family. Take care, Peace!!