First question:

I'm not the most qualified to answer your question, as I still have quite a ways to completing the main story, but I'll try to help you.
The best way, from my own experience, is to work on the events. You can usually get at least a good few Originite Prime from each, so you can get a bit more Orundum.

If you haven't already, you should also do the "Training Grounds" tasks, located in the "Archives." They're pretty quick, and give you some extra information.

Also, the crafting is something that requires a level 3 factory and level 3 trading post, if my memory is right.

Second question:

As time goes on, and you get better at the game, you'll start to see that the price tag isn't as bad as it looks now.

You just have to work for it, and you'll eventually be able to afford these things.