Please remember that not all LEDS require the same supply voltage. Those that do, can be wired in series using a single resistor of the correct value to reduce the supply voltage to the correct level to enable the LEDS to work.
LEDS that require different voltages can be wired in parallel provided that they each have their own resistor connected to their positive leg.
A model like the Mowe 2 would, I imagine only require maybe three or four LEDS at most for navigation lighting. Unless you want to put lights in the wheelhouse or install spot lights, flood lights and/or bulkhead lights.
If you are only going to install three or four LEDS, it would depend on where you want to run the wiring in the your model and how complicated you want to make it. Try to imagine if you have to fault find at a later date so, keep it as simple as possible.
Ian.