Wow, it sounds like you're going to have your hands full. I would suggest that you start trying to wean her off breast milk and get her drinking cow's milk now; this is the age that doctor's recommend that children start drinking whole milk for the fat content; they get a lot of things they need to keep them from getting sick by the fat proteins in whole milk. If you have a pump, I would pump the breast milk and have her drink it from a bottle; mix it 1/2 and 1/2 with whole milk and every few days, increase the whole milk amount and decrease the amount of breast milk until she is taking nothing but whole milk. Then, right before she goes to bed, give her a bottle of whole milk; you could put a little bit of rice cereal in it; it can help make her a little more sleepy and more full so she doesn't have to wake up in the middle of the night. I used to leave bottles of water in the crib with my kids and they'd drink that when they would wake up.
And as for the cry it out method, here's something I had to do with my daughter (who didn't sleep through the night until she was almost two; she was up every 20 minutes): when she cries, let her cry for a few minutes until you are sure she isn't going to go back to sleep; then, go into her room and rub her back (My kids refused to sleep on their tummy and after a year, if they can roll over, they're safe to let sleep on their tummies) until she calms down. Do not pick her up unless she becomes hysterical, just rub her back and murmur things to her until she settles back down. You can also try taking her into toys r us and letting her pick out a stuffed animal to sleep with. It might help her feel better about sleeping all night; we bought my daughter a stuffed sheltie and it worked like a charm; she wrapped her little arms around it and held tight and slept from about 9p-6a ... still up too early for my liking, but at least I got a full night's sleep. lol
Good luck and Mazel Tov on your upcoming blessing.