So I basically found Money Planet.
Covered in Vortex Cubes:
I've gather like 150 so far all within like 200m of one of these:
It is like a 5 second flight to and from the place I am gathering the Cubes.
This planet also has these things which give purple resources worth like 375u per unit:
Made ~3mil in 30 mins so far, would be more but I only have ~25 free slots between my exosuit and ship. Plus I have to deal with Extreme Cold and storms like start every 5 mins.