Tyne and Wear alone has a population of over 1 million. I posted about this a while back, but, regarding catchment areas, it's misleading to use the populations of the cities proper. People have studied this https://www.statsmapsnpix.com/2021/01/which-football-team-is-nearest-me.html?m=1 and the results are eye-opening, especially compared to lists where Sheffield is 4th or 5th biggest city in the country. Scroll down that article for a link to a spreadsheet showing how many people each club is the nearest for. We do terribly, but that's because of how Sheffield itself is split. However, even Sheffield's population combined is less than that for many clubs. For urban areas, we have: Liverpool: 2.1 million for 3 league teams, one of which is Tranmere; Manchester 3.5m/7, W. Yorks 2.1m/3, W. Mids, including Coventry, 4m/6, NE 2.8m/3, London 10m/12, Bristol 1.5/2. So generally 700-750k per club. (The study was done a few years ago, and the precise numbers vary depending in which teams are in the league.) Manchester is a bit less, but the two big teams get around that on their own. Sheffield? 750k split between 2 teams. S. Yorks? 1.8m split between 5. Then you have all the clubs that are the only league team in their county. Obviously, a big population to draw from is no guarantee of, or prerequisite for, success, but if anything it makes it even clearer just how good our support is. Personally, I agree 35k wouldn't be enough, and I'd also start with around 40-45k with scope to expand.