Cross-readings along the axes of expensive:

The Mundane Afrofuturist Manifesto [EN] (2013)
The Mundane Afrofuturists promise: To produce a collection of Mundane Afrofuturist literature that follows these rules: No interstellar travel—travel is limited to within the solar system and is difficult, time consuming, and expensive.
The Mundane Afrofuturist Manifesto [EN] (2013)
No aliens unless the connection is distant, difficult, tenuous, and expensive— and they have no interstellar travel either.