I have a website listing real estate in different areas that are for sale. In small villages, towns, and areas, sometimes there is nothing for sale and therefore the page is completely empty with no content except a and some footer text. I have thousand of landing pages for different areas. For example "Apartments in Tibro" or "Houses in Ljusdahl" and Moz Pro gives me some warnings for "Duplicate Content" on the empty ones (I think it does so because the pages are so empty that they are quite similar). I guess Google could also think bad of my site if I have hundreds or thousands of empty pages even if my total amount of pages are 100,000. So, what to do with these pages for these small cities, towns and villages where there is not always houses for sale? Should I remove them completely? Should I make a 404 when no houses for sale and a 200 OK when there is? Please note that I have totally 100,000+ pages and this is only about 5% of all my pages.