Submitting as a partial, or not even as an answer, and also probably not answering this per se, but:
(thought I would put it in as I have not seen it mentioned elsewhere)
What was the main method of interplanetary travel in the Blade Runner universe?
Blade Runner 2049 explicitly shows an Off-World ship - only that there is no further information beyond that - there is no explanation for power source nor how it functions for example.
Concept artwork by Adam Baines for Blade Runner 2049:
Offworld Ship
Sketches for a ship seen overhead when leaving LA. I did some quick block out sketches in 3d Coat and then did some rough renders to mock up the shot.
These made it in to the movie, where you see it looming out over the landscape:
More detail from concept:
Interestingly, these vessels are not only interplanetary, they are capable of operating in the atmosphere...
Earlier concept examples:
His page can be found here: https://adamb.artstation.com/projects/x9NzE
Note:
Because of the design, many thought it was a link to the Alien universe or even the Sulaco itself, which obviously it was not:
And just to add, the 1998 movie Soldier penned by BR's David Peoples, with BR Easter Eggs added by the vfx artists and BR's Art Director David Snyder (replica Spinners), added ships that were either in battle at Tannhauser Gate (suggested) or some other battle in the Off World colonies (in the script as the Trinity Moons), and was considered as sharing its universe with BR (or sidequel):
(IIRC, the battle sequence is incomplete due to budget, and was referenced as a deleted battle at Tannhauser Gate). Having said all that, despite the connections I'm pretty sure most do not consider Soldier's shared universe as canon though.
even more off-topic, I found these of the Soldier interplanetary ships: