Nice setup! I think you're off to a great start, and your focus should allow you to come up with some really ecclectic problems for the players to solve, from pesky wildlife, to engineering problems to thieves/competitors/bounty hunters. None of which need to be 'Mech equipped to be a problem, which makes life easier for the GM.
One question: would it make more sense if both players operate the industrial Mechs? Seems like Han Solo will be doing very little when Indiana Jones is up to his hips in trouble, and vice versa? Maybe I'm not grasping your intent.