What is the space port lot's function? What activities or objects will be there?
Well, I have been planing to build an aerospace center for a while now. I wrote down activities for the building which includes: building the rocket ships, using the observatory, reading rocket science books, writing on the topic of space, rockets, and extraterrestrial life; studying logic, working on research and debate skill, publishing research papers, contributing knowledge.
I also plan to build a separate lot for Robotics and Programming which includes activities for: using the robotics station, programming, logic, using woodworking bench.
These are all things that I think in some way could be finessed to get money out of them. Your E option, medical/science officer, might be broad and vague enough that you can split up science duties because as you said, there are a lot of science related skills and activities in TS4, in general.
What is the purpose of the spaceship? As in, what is their mission in space? Are they studying any potential life, i.e. plants? If so, you can have them do things like analyze plant samples, write books on the extraterrestrial life. Are they studying the geological qualities around them? If so, they can look for fossils, extract metals and crystals, refine crystals, analyze fossils.
It might be tricky if they can't stray far from the actual structure of the spaceship itself because of the world around the lot breaking the immersion, but I think some activities like writing, contributing knowledge, the debate (?) might be kind of generic enough for you to roleplay it as the work they're doing.
I kind of want to suggest having them build the rocket ship because then someone can go do missions in space and you'll get the pop-up adventures too. But that depends on how you build your spaceship.
