If you are going to use an adjacent room, then you need to look at what is having on the walls to be removed. Credit rating bearing, then you will have to put in a beam to support the burden. Most of my clients would prefer to see no evidence that the wall has been removed. In other words, they want a flush ceiling, which means you have to slice the joists apart and set up an in-ceiling beam. It can not that hard, but there is a particular technique to achieving this. I suggest you use a qualified remodeler to do this.
The particular fourth thing is to seek advice from with a professional interior designer. If you have enough budgets, a professional bath decor expert can be well worth it. He can often bring many new ideas to the table which you may have never thought of. Typically the interior decorators also may also have a large collection of the bathroom images and the colour samples for you to look at. The experience of interior decorators that working with wholesales can also make it simpler to obtain the materials that you might want to complete your project.