She's almost two, and her sleeping habit is very set-so yes it will be tough to change-as in LOTS of crying.
Are you saying you want to move her from your bed, but still keep her crib in your room? The crib is a restraint, and she is almost old enough to be out of her crib, in which case she will do what she wants, as in crawl into your bed. You should train her now for whatever you goal is when she goes to a normal bed. Because it may take time.
If your goal is to have her sleep in your room, ferberize her gradually or let her cry it out all at once in her crib. Try to think of the greater good of having her able to sleep securely on her own, rather than your own discomfort at her crying.
During the first day or evening, make some sort of special party and explain to her she now sleeps herself and make it fun. Then at bedtime, don't give in. Make sure she eats a lot all day and doesn't drink right before bed so she doesn't wake up at night hungry and having to pee. Make sure she's had tons of exercise and sunlight and no sugar. Then put in your earplugs and wait it out. You created the attachment, but she can adjust and grow past it. Kids are very capable of sleeping securely through the night alone.
If your goal is to have her asleep on her own in her own room soon, I would put the crib in her room and do the same thing. You may need a temporary arrangement for your son so he can sleep. If you let her cry it out, walk away and don't give in, it will usually not take longer than a week for her to learn she can herself to sleep. Sometimes just a few days. I'm not familiar with ferberizing, so I don't know how long that takes. My kids have always slept alone with no trouble, but a few friends of mine made the switch at about 20 months, and in the end had to let them cry it out. It took from 3 days to a week.
It will be very hard at this age, but not impossible. Figure out what you REALLY want for your daughter, and then do what it takes. You will feel rewarded when she feels secure and happy sleeping alone. Make bedtimes and mornings even more fun as a reward for her new maturity.
If you think you may give in because of her crying, don't try too long (or at all), avoid the trauma and keep co- sleeping (warning, my friend's niece sleeps with her parents at 4!). If you wait for her lead, you have no idea how long it will take her to outgrow it.
Keep in mind, you will make it much worse if you train her to scream a long time to get you to take her back to bed. Really do it if you're going to do it! Follow through! Good luck!