I just spent 1.1 billion credits on the 7 ships I consider my 'core fleet'. I bought another Cobra MKIII, Cobra MKIV, Vulture, Asp, Python, Anaconda, and Corvette. Since my core fleet is already engineered up, I decided to buy another set for use with the new engineering to compare final stats. I applied Black Friday paint, named them all 'BEYOND' and docked them at another station in the same system. I then outfitted them the same as my other fleet.
The plan was to engineer them before 3.0 so I can then skip some of the 1-5 grind but I'm not sure I'll have time to get that done.