SpaceX is not cash constrained. Every offering they do is extremely limited in terms of who they let invest, yet is still always massively oversubscribed. They're spending multiple billions per year on both Starship and Starlink but haven't been tapping the capital markets -- IOW internal cash flow is also massive.

NASA's cash is nice to have. But it's not what's important to SpaceX at this point. Their estimated valuation is somewhere in the $200bn range. Their cash cow is Starlink (with 3 million subscribers and growing each month), the future profitability and competitivity of which is highly dependent on Starship being operational and fully reusable.

I know Elon says Multiplanetary this and Mars that but the real reason for the Starship push is Starlink. They need Starship to put bigger (V2s non-minis and V3s) and more satellites into the orbit if they want to get to that 35000 number this decade and not break the bank. They need to hurry before the likes of Amazon get their shit together and start building their own internet satellite constellations.