We would like to build an autonomous marine vehicle can go on a voyge to filter water and bring back drinkable water to the city, using wind and PVC for energy generation.

We would like to build an autonomous marine vehicle can go on a voyge to filter water and bring back drinkable water to the city, using wind and PVC for energy generation.
Oh dear do you think investing in its fuel and crew and other formalities will pay you the price of water