I would like to build a ship to travel to Alfa Centari......
Currently with today's Technologies using an efficient warp drive tech, a ship can safely reach 20% light speed in uncharted space, I know warp can reach much faster speeds, but without knowing what you will face ahead 20%ish is safe, as it appears to be empty space it is most certainly not...... example:
With today's sea faring boats, GPS and depth sensors makes it much safer to chart a course at sea today than it was 15 years ago.
15 years ago using only charts and nav radios was still very hazardous, as to what looks like open waters would have land masses and coral reefs just 2ft below the water line........... hit that and cause serious damage to your boat........ no unable to control or get away, the waves continuously SMASH your boat into the reef again...... Again...... and AGAIN until there is nothing left but debris, even if you somehow were to survive that ordeal, you would not know exactly where it happened to report it so that it can be charted so others don't become as unfortunate as you were......... so even TODAY on the sea there is still much unknown dangers.
Thus with current tech..... 20%ish of light speed can be safely traveled into unknown space, once a safe course has been established, much faster speeds can be reached.
With current warp tech you can almost instantly reach your cruising speed and slow down, as the warp tech produces a falling effect to propel the ship / pulling the ship and all its contents at the same rate thus no SPLAT against the wall when speeding up or slowing down.
The ship will take about 30 years to reach Alfa Centari, time passage onboard the ship will depend upon configuration of the warp procedure but.......... the warp ring on it's most outer edge will have a time passage of 100's of thousands of years, thus it must be constructed using the highest quality materials and engineering techniques to actually last that long without failure or atomic decay, and would have to be inspected, rebuilt and/or replaced once every trip........ until technology in the future allows otherwise.
Molten Salt Reactors can be used to power the warp technology using an epoxy type heat generating fuel such as Plutonium or Ameriecium.
As the passage of time onboard the ship will only be a few months, there is no need for cryogenic or hypersleep will be needed.
If the game and/or mod can support or come close to supporting this, please let me know.... I'm still debating on getting Kernal Space or Space Engineers?