Ryu didn't blink at the obscene price that represented the near sum earnings of Valor City in a year, he simply went about the business of handing what he owed over. He didn't plan on making this sort of large purchase again, anyway. After all, he had the Incubator. The only reason he bought so much to begin with was so that he'd have a sustained flow until the Incubator could provide him a continuous stream of resources.
The Incubator, after being improved by the Origin Essence of Ryu's final Rite could accelerate growth by a thousand times. If this was stacked with Ailsa's abilities, it was the equivalent of a ten thousand times increase in speed. This meant that Ryu's Spirit Seeking Lilies would only take one year to reach maturity instead of his previous ten-year estimate.