>>106166640 (OP)Sending things into space is really expensive. Currently $1500/kg via Space-X, $50k/kg when we had the Space Shuttle. Though I suppose Space-X is effectively a taxi cab, while the Shuttle was like sending up a whole RV.
Our best technology for getting things up there is putting it on top of a big bomb and controlling the explosion.
We don’t have the technology to predictably produce things out of energy. So any spaceship will have to be a miniature Earth, everything needed to survive and maintain it will need to be brought along.
Things are really far away. And moving. Fast.
There’s little in between things in space. It'll be a long and boring trip. We’re like an ant trying to traverse a tabletop the size of North America, LA to NY. And any roadside attraction on the way is off the direct-line path.
With current technology, it’ll take a year to get to Mars. One way. When our orbits line up. Remember, everything is moving.
Even light takes at least 3 minutes at minimum distance.