What is the most logical next event?

How to add a bedroom
Design your room.
Create a budget and determine how large of a space you want to create. Remember that in most towns a bedroom must fit the legal requirements of having at least one fully functioning door, window and closet space.
It may be helpful at this point to hire a designer to help you design your room so that you can maximize its potential. Determine if you have the space in your home.