I never thought about gear-driven. Good thought. People think I am crazy when I say that I want to build a manned drone but honestly, it shouldn't be that difficult. The main cost would be the motors. 200lbs is a lot of weight to get off the ground. I am thinking of something like a 12-18 prop drone.They can be very creative. I know of a VERY large X8 using them to carry itself and a 40lb winged drone. If you need super heavy lift think about a gear drive.
Manned drone is an oxymoron. Once you place a human inside it becomes a manned aircraft. It may well be fully automated, as many of our large airliners almost are, but it’s still manned.
Just for goggles, some of the first “manned drones” were employed during WWII, where B-17’s were loaded to maximum capacity, launched using a human pilot, with the pilot bailing out of the aircraft after take off with further control handled by ground stations.