Investments System for FASA Star Trek Role-Playing Game

Ok, this is rough.

I've been trying to design an economic system for FASA's Star Trek for about 30 years. Nothing really works well.

Feel free to use or add this as you see fit. Oh, you'll need to add to it, because it's nowhere near finished.

Investments

If a character receives credits they can purchase property and businesses. Investments can be made to improve the annual profit.

Land/Properties

Half of the planet Taylor’s World – 1,500,000
                Annual Profit: 200,000

1,000 acres on Kramar – 80,000
                Annual Profit: 10,000

12,000 acres on Rigel IV – 200,000
                Annual Profit: 50,000

1,000,000 acres on Arbazan – 2,000,000
                Annual Profit: 300,000

50 acres on Earth – 1,000,000
                Annual Profit: 100,000

Space station in orbit around the planet Drayma – 1,000,000
                Annual Profit: 150,000

Small office building on Earth – 5,000,000
                Annual Profit: 250,000

Medium size office building on Earth – 10,000,000
                Annual Profit: 1,500,000

Large office building on Earth – 15,000,000
                Annual Profit: 4,000,000

Small house on Earth – 100,000
                Annual Profit (if rented out): 50,000

Medium size house on Earth – 500,000
                Annual Profit (if rented out): 100,000

Large house on Earth – 1,000,000
                Annual Profit (if rented out): 200,000

Small office building on Xelatia – 100,000
                Annual Profit: 25,000

Medium size office building on New Paris – 1,000,000
                Annual Profit: 200,000

Large office building on Yaraka – 5,000,000
                Annual Profit: 1,000,000

Businesses

Bar on Starbase 54 – 50,000
Annual Profit:
1-10 – 100,000
11-30 – 70,000
31-50 – 50,000
51-80 – 25,000
81-100 – Loss: 10,000

Restaurant on Earth – 150,000
Annual Profit:
1-10 – 300,000
11-30 – 225,000
31-50 – 150,000
51-80 – 75,000
81-100 – Loss: 50,000

Bar on Celes – 25,000
Annual Profit:
1-10 – 50,000
11-30 – 40,000
31-50 – 25,000
51-80 – 10,000
81-100 – Loss: 5,000

Software Company (offices on Argolis and Earth) – 400,000
Annual Profit:
1-10 – 800,000
11-30 – 600,000
31-50 – 400,000
51-80 – 100,000
81-100 – Loss: 80,000

Textile Company (factory on Taibor) – 100,000
Annual Profit:
1-10 – 200,000
11-30 – 150,000
31-50 – 100,000
51-80 – 50,000
81-100 – Loss: 40,000

Gold Mine on Mazar – 2,000,000
Annual Profit:
1-10 – 4,000,000
11-30 – 3,000,000
31-50 – 2,000,000
51-80 – 1,000,000
81-100 – Loss: 800,000

Computer Component Company (office on Betazed) – 50,000
Annual Profit:
1-10 – 100,000
11-30 – 70,000
31-50 – 50,000
51-80 – 25,000
81-100 – Loss: 30,000

Advertising Company (office on Dakala) – 150,000
Annual Profit:
1-10 – 300,000
11-30 – 225,000
31-50 – 150,000
51-80 – 75,000
81-100 – Loss: 50,000

Freightliner Company (offices on Mars, Andoria and Vulcan) – 1,000,000
Annual Profit:
1-10 – 2,000,000
11-30 – 150,000
31-50 – 1,000,000
51-80 – 250,000
81-100 – Loss: 150,000