Active job

Interior painting of walls and ceiling.

We’re looking to repaint our interior. House is approx 191m2 incl garage. Not intending to do garage so area to be painted is closer to 150m2. Entire interior is currently wall papered in a plain textured wall paper in reasonably good Nik but not too sure over painting it is a wise idea. Open to suggestions on this. Might pay to come see first. Cost vs outcome will be important. Have added some photos for context