So, basically, rip off everything and start with the inner pressure vessel from a Dragon.
Hell no. Just take the landing mechanism from the grasshopper (and probably adapt some of its control software too) and put nine tons of hydrazine on it. Then put four SuperDracos underneath it with gimbals and expansion nozzles, and attach that module to a Dragon's heatshield.
Of course, at that weight and that propellant level it wouldn't be able to take off again. I kind of expect that would be half the point.