@GotRPM thanks for your input.
The first important topic is to have a good sizing of battery-controller-motor and later will have to test different propellers for best performance.
Below is a rough design of the boat. I'm still working to figure out if I can build it with in 2kg weight. I am not actually sure how much installed kW power I need in order to get relevant high speed.
Actually the reason I opened this topic is to get support in sizing the power plant and propeller.