Buying the sub is just the start. You need a crew. And training. And a dock. Submarines don’t fit in a regular garage. You’ll need a deep-water pier. Rent on that? Thousands per day.
Fuel is cheap for nuclear subs (uranium lasts 30 years). But for diesel-electric subs? Fuel costs add up. You also need special batteries. They cost as much as a house.
How Much Does It Cost To Build a Submarine? (10 Real Examples)
And then there’s maintenance. A submarine’s paint alone might cost $50,000. Salt water is a jerk. It eats everything. You’ll need a full-time team of engineers. Think of it as a floating, sinking hospital bill.
