I like the dramatic sense of motion you're conveying here without sacrificing any of the form or detail on the craft. ("blasting across the alkali flats in a monkey-navigated death rocket" immediately sprang to mind...in a good way )
Just throwing out ideas here but...old model low cost patrol skimmer (not great in eather capacity, but better than nothing), used mostly by private security & some 3rd world militaries? I just thought this up in 2 minutes, Im better with ideas than I am art.
My initial idea was of it being old hardware that was being used as a drug mule, but it would probably be configured differently. The guns would almost certainly be removed for additional speed, range, or cargo capacity.
I found that I had more questions than answers as far as role and layout, so I let it go for now.