Star Wars fans are people who enjoy high fantasy, mythic stories. They like action, drama, romance and teasing out deeper significances to the characters and plot points, relating them to other myths and archetypes in literature. They like technology to be fun and futuristic without needing to understand how it works.
Let's ignore the technologies that might be impossible (e.g. warp drive, dilithium crystals, and transporters). Let's ignore the technologies that we have no idea how to reproduce in a similar way (artificial gravity). Let's just focus on trying to build a space-worthy scale replica of the USS Enterprise that uses existing structural and propulsion capabilities.