When going fulltime, one of things on your to do list is to plan your exit strategy to answer this question. The answer varies from person to person. Some plan to live in their rv but not travel. Some plan for an apartment. Some saved the money from the sale of their home and plan to buy another house or condo. Some plan to live with their children. Some buy into a continuous care retirement village.
Since we sold our house at the bottom of the market, we needed to buy before the real estate market took off again so bought in Santa Fe, NM at the end of last year. It will be a good "home base" and we can make many summer trips from here and go south in the winter.