The easiest explanation is that the writers and the designers and the animators probably never met each other, let alone talked much (as is usually the case). So when it was written, they were in some super-shitty place that the designer's all "fuck that" and drew up something like this

And nobody thought it would matter that much because the likelihood of "do they use Quickbooks" coming up as a contention among fans was remote.

FWIW, I was walking on the docks with a buddy of mine back in '03 or so. he discovered that you could buy a 175' fishing trawler for $150k and decided the economics of the world were upside down as that's as much as a 35mm Panavision cost at the time (they're much cheaper now). Never mind that $150k is a used Lamborghini, a new Patek Philippe or a 3-bedroom home in Kentucky.

When I broke it to him that moorage fees were also on the order of $18k a month and the bunker fuel necessary to get it to Alaska where it could fish was around $50k he grew more annoyed, not less.

Your point is well taken and I agree. however, I can also imagine a Millenium Falcon with a quarter tank of dilithium crystals or whatever and nothing in petty cash left for a drink at the Mos Eisley spaceport.