I have been getting several missions that I'm not sure are doable. The latest one, I received today, was a mission to deliver 180 explosives to Hutton Orbital from Mother Gaia at Galileo in Sol. The payout was 5,000,520 cr. How can you deliver that much if no ship capable of carrying that much cargo can land there?
Python is a medium ship and can easily carry over 200t, I think the dropship or gunship might also be able to carry enough.