If the H-20 does have the range and passable stealth characteristics attributed to it, it could alter the strategic calculus between the United States and China by exposing U.S. bases and fleets across the Pacific to surprise air attacks.
Let’s assume the government is willing to toss its Naval Shipbuilding Plan out the window and that the US is willing to sell us Virginia class boats off-the-shelf from US shipyards. What would it cost?