That’s quite a stretch since 95% of the world population lives on 10% of the land. [1] We can also build vertically, and space is a whole new frontier that is seeing lots of interest lately. I don't see this as a serious limitation. Opportunity is endless.
Start by making things where you live right now. In fact that's how many HN users are producing value as we speak.
Finding and controlling land to expand your business is not a serious limiting issue. You have effectively infinite headroom before you need to worry that you can't own a factory on Earth because too many other factories already exist.
1. https://www.sciencedaily.com/releases/2008/12/081217192745.h...