Steve,
Those RC speedboats are neat. Holy cow, I'd have to buy a real trailer to transport one!
That reminds me, first thing I did when I took up RC flying back in the good 'ol days was buy a big 'ol Suburban for transport. Man, that was a kool vehicle and it worked like a charm hauling our stuff around.
BTW, I later got into RC gliders, the pure ones. They can be huge (though I never progressed past a beginner model) and launched with a Hi-Start, I think they were. Basically a 100' medical grade rubber band. Never crashed a glider! Also did one electric motor RC glider and actually still have that one.