This is about an hour and a half of work. I first spent about 45-60 minutes to develop ship 1, then another 45 minutes roughing out concepts 2-6 with light greys. I intentionally did not further develop ships 2-6 because my intention was to establish a series of ideas to expand upon later.
Ship 01 is inspired by Elite Dangerous and the prospect of a human/guardian hybrid ship, ships 2-6 were inspired by elements from ship 01.