The Galileo shuttlecraft was a pretty good sized prop too.
The difference being that it was intended for ongoing use so the cost was amortized across the full series. Also, didn't they contract the construction out to AMT in exchange for the model-kit rights, or something?
Yup. Which has been giving us model-builders a
for decades, because the AMT model is horribly, horribly inaccurate to both the prop AND the filming miniature.