The first card tells me you're experiencing a bit of wanderlust and excited about the trip, but you need to plan it more carefully.
The second card represents your obstacle, and honestly it's a doozy. Prepare for the unexpected, you're either going to drive through a sandstorm or a crazy person is going to block your path.
The third card represents your goal, and in this case it bodes really well for your trip. It says you'll be good at this and extremely successful. Definitely go forward with this plan. The next card basically echoes this. Strength, victory, you're going to overcome whatever that obstacle is through strength.
The next card in a roundabout way is saying the trip is going to be really exciting for you, you're either going to return with an interesting story, or you're going to meet someone really wild.
The next card essentially says to embrace your fears and anxieties. If you're worried about something, just prepare for it. I don't know if it's a money thing, or a legal thing, but make sure you have all your bases covered and you'll be fine.
The next card suggests you need to behave maturely, don't let your imagination run wild. The next after that basically echoes this, act like a businessman, project professionalism.
Second to last card again references a fear of a possible crazy person.
Finally, your last card referencing the outcome should you go through with your plans is Justice. A very good sign you'll be quite happy with the results.
So, tl;dr: You're going to be really successful in the gun business, but watch the fuck out for crazy people and prepare for absolutely everything.