Made this just for fun. I present to you the MHU-S ISV/S. Mega Hyper Ultimate System, Interstellar Vehicle/Station.
This thing has a catalyzed fusion torch engine, powered by PETN (Penthrite) and capable of pushing the station to about ~90% lightspeed, but in a long time span. If you want to gently launch this thing off any pad, set the throttle to 1-2%. Good luck trying to launch this off at 100% throttle (lol).
The station has 7 RTGs, 10 radiator arrays, and 4 solar panel arrays to maintain its energy and power. The engine can operate for about 6.5 years as well (according to the game).
You can dock 4 spacecrafts at a time. If some are big, just dock them sideways (or smth).
AG1: Fusion Torch Engine
AG2: Gravity Ring
AG3: Radiators
AG4: Floodlights
AG9: Solar Panels
Be careful when getting close to a star (literally).
Wow. just wow