I've been thinking about our door opening issue and think I may have found a solution... But, before I propose it to MrB I thought I would run it past you first...
So, what I am thinking is of converting the door which has already been installed... so that it swings outward into a hallway, what do you think?
This is how far the door would open:
This is the vanity & toilet layout with the inward opening door:
As you can see, the vanity has to be under the mirror as the plumbing is already in place: