Is it going to be hard? Yes, that is what parenting is all about. Have you heard of the book, "Parenting Isn't for Cowards"? Is it going to be worth it? Yes, as you will get to see her grow up and mature to another stage of development. Remember, it is all about her needs, not yours. She needs to reach another milestone of independence and not completely relying on you to sleep.
The other benefit is your husband and your relationship. Having just the two of you in the bed allows for more intimacy and your husband needs to know that you still see him as the stud that you desire and crave. If you have lost that craving, then "fake it 'til you make it" works here too. Most husbands will take a back seat to their wives' desire to be mommy 100% of the time, but they need to have their wives all to themselves on a regular basis.
Rewarding your daughter each morning that she has slept in her own room can also give her something to look forward to. Having a sticker chart that allows her to keep getting bigger and bigger rewards is good. The wall decals that Shaun mentioned are perfect as a start since she will want to decorate. You could do one sticker each day. During the day while you are playing in her room, talk about what the next day's reward will be. Then there are light plates, name signs for the door, etc. Make it a big deal and plan on shopping often, even if it is just for a poster to hang on the wall. She will enjoy the special time of shopping with you. Give your daughter the opportunity to shop with Dad alone as well. Once she gets a week's worth of stickers, plan a day at the library or park or wherever. Then plan another one after another so many days of stickers. It's going to take a lot of rewards so it will be worth it to her. Don't make it about you or your husband. Always talk about how big she is getting. Tell her about kids she knows that have their own room.
Give her lots of control in the move. Do you want to move on Saturday or Sunday? Which part of the bed should we carry first? Should we put the bed against this wall or that one? Do you want to move the dresser? What reward do you want tomorrow, this or this? Everything should be her idea, but give her specific options. And don't worry if she wants the furniture in a weird spot. You can always change it later. The main goal right now is to get her in her room.