Definitely. But I want propane as it's much cleaner than gasoline in terms of emissions.
LEHR used to make propane outboards, but went out of business years ago. At the moment I just see (in the USA) 5hp propane outboards (Mercury, Tohatsu). That's enough power to go about 10mph, but they don't come in remote-control models. Then there's Seatan (out of China) with a line of propane outboards topping out at 20hp.
Setting aside Seatan, I'd need to either convert a 5hp tiller model to remote control, or convert a (say) 20hp gasoline remote model to propane. Most modern gasoline outboards use fuel injection, and my understanding is that a carbureted engine is easier to convert to propane.