Debt-Funded AI and Space Buildouts Raise the Same Question: Who Pays?

SpaceX's plan to build a $100 billion spaceport has investors asking where the funding will come from, according to MarketWatch, with an analyst saying the company will need to raise substantial debt to cover it. The report lands the same week a Seeking Alpha analysis argued that AI-related spending has become nearly the only thing keeping the US economy afloat. Together, the two items point to a common tension in this cycle: enormous capital commitments to AI and space infrastructure are increasingly funded by debt rather than existing cash flow, at a time when that spending is also being credited with propping up broader economic growth. If that spending is debt-dependent, its durability depends on continued access to credit markets on favorable terms. What is unresolved is how much of SpaceX's $100 billion plan will actually be debt-financed versus equity or partner funding, and whether AI capital spending keeps growing at a pace strong enough to offset any slowdown in other parts of the economy.