I’m wondering how big your current home is. Downsizing is about letting go of more than bedroom(s), it’s about a way of life and the contents of your home. I can understand your desire to finish a mortgage and stop work, I can also understand your wife’s desire to have space for family to stay. Would a two bedroomed property be manageable within your budget? As sunlover says that gives room for family but it also gives you and your wife space to live. One bedroomed flats can be very claustrophobic for a couple used to more space. Whatever you decide I hope you can come to an agreement taking account of the viewpoint of each other. Resentment isn’t the best way to begin a retired life together. I hope this can be worked out amicably, wishing you both well.