Hi J.,
There are many different ways to handle your situation. I can tell you what I did.
1. Continued breastfeeding was important to me while working. I found it easier to keep up milk when I nursed at night. Dr. Sears mentions this as a secret key to success that working breastfeeding moms know. Swearing off nighttime breastfeeding might work for a SAHM, but not usually a working mom. Since I continued to breastfeed, I found I got more sleep and less nighttime disruptions, and had a good milk supply, if my daughter slept close to me. I also felt she DID need food at night, especially because she was smart enough to avoid bottle feeding during the day and wait for me to come home to her. She didn't want the breastmilk from a bottle.
2. At six months, she was too big for the cosleeper, pulling up, and I was afraid she could fall out. I brought her in bed mainly so I could get more sleep. She hated the down-the-hall sleeping arrangement and cried for a long time. I bought a bed guard that clamped down ON TOP OF the mattress. No gaps to fall into. My husband was not next to her. I was never concerned about rolling onto her. Mothers, especially breastfeeding moms, are pretty instinctive about this, provided you are not drunk or zonked on drugs of some sort. Fathers can have these instincts too, of course.
3. She stayed in bed with us until she was about 18-24 months. Nighttime feedings diminished over time and I tried to discourage them as time went on. I can't remember exactly when, but she became too big and annoying for us in bed. We tried to move her into her crib in her room at that time. No deal. Lots of crying. We believe that cry-it-out does not teach "healthy" sleeping habits. Rather, it simply teaches the child "when I cry, you don't come, so I may as well not cry anymore." We don't subsribe to this psychological "training." Kids don't understand that you are trying, with the best of intentions, to "teach" them anything. They just feel the brush off. Many cultures co-sleep. It is commonplace in Asian countries. It is a cultural conditioning that has taught us to think "this co-sleeping thing has to end." There is a strong tendency to separate mothers and babies in our society. It is helpful for many establishments (e.g. education, business). Your instincts are a better guide (ie. that part of you that wants to keep her in bed with you forever). Mothering magazine, and its website, has many articles on the benefits of co-sleeping.
4. By two, we tried to move her to her crib down the hall. Again, lots of crying. We couldn't deal with the loss of sleep, or her crying. We moved her crib into our bedroom, side came off to make toddler bed, and she still sleeps there at age 5. (By the way, I weaned her at 2 1/2).
5. Many would not allow this sleeping arrangement, calling us crazy. But I see our happy, well adjusted, well behaved, emotionally connected, well-spoken, sensitive, thoughtful, compassionate, funny, creative, independent minded, intelligent, well rested, maturing child and beg to differ. She loves playing with other kids and is extroverted. She has tried out her big girl bed many times, sometimes spending the whole night there. Then she comes back again, unsure whether she is ready to take the plunge and grow up for good. She stated "the only time I don't sleep in my own room is when I'm the only one in there!" She recently declared she is never going to leave us. We laughed, knowing that in a few years she will deny she ever uttered such nonsense. And we will miss the day we heard her say it. Most kids tiptoe down the hall hoping for permission to crash. Many parents we know admit they let them in. It's a secret society of parents who acknowledge their children's emotional nighttime needs and have the courage to support them, depsite what the "good doctor" says.
There are more of us out there than people like to admit. We receive scathing criticism. Much criticism comes from people who themselves didn't have the mettle to provide the level of nighttime parenting that their kids really needed. So they mock those that try to do this. We admit it is hard to support kids to the extent required, all the time, especially at night. Layer on a few more kids, and parents start to get positively overloaded. No criticism of those who falter. But if you can find the strength to support them in the early years, the payoff in terms of your child's psychological health is worth it. Some may move to their own room more quickly than others. No set rule here. All depends on your child.
Try getting the book "The No Cry Sleep Solution" by Elizabeth Pantley. She's good.
Good luck!