RE: Micro rigger (12 inches)
i just looked at your equipment list, im just guessing here, but i think the 10amp speed controller will not hold up very long in your boat. maybe find one in the 20 amp range, boats are hard on esc's. my suggestion to stay within a low budget would be a thunderbird 18 controller for that motor. you can get them for $25.
once again, the boat looks really cute so far, it should be fun finding out how it runs.
john