You can do with even less: 5 batteries, 4 engines, the 3 crewmen, full decked drone bay, and around 15 solar panels, ensuring 4 times the consumption (since it gets reduced to 25% on destination). The consumption of matter is 3x10 + 5 + 4 + 10 = 49. For 240 days of travel, it amounts to 12 tons. Assume 20 tons above the required for travel, which is around 30 tons, so a total of ~50 tons of matter.