Yes. It's a capital investment and bootstrap problem. But once you build enough infrastructure, you can build from materials already up there. Kind of like the proposed Mars missions. Lifting out of Earth's gravity well is a huge problem.

My point is solvable with current technology. Land based fusion is simply not at this point. Not after Trillions in investment in research units which will never produce power. You can throw a lot of stuff into space for that money. Unless you know of materials that can resist 15M degrees Celsius.