Firstly, a warm welcome to the Mayhem community. I am sure there are many here willing to help you or answer questions.
You have already completed an amazing number of static ships in quite a short time. Well done
You will need a transmitter, plus a receiver in the boat. After that an ESC controller for each motor, and a servo to operate the rudder.
Component shop do very small bright LED's, wiring and controls, plus batteries etc. Very professional and prompt service. Thin wiring can be run inside the superstructure.
I would recommend Cornwall Model Boats, and Dean's Marine for kits and fittings etc.
Tools you should be able to get locally. I assume you must have some to have completed the ships you have.
Hope this helps
Cheers, Bob K