Yeah I just changed the "funds" reference in the save file.
For the second base custom layout, i just make the elevator, then saved and copied all the stuff inside "facilities" of the first base into the second:
facilities:
- x: 2
y: 2
type: STR_ACCESS_LIFT
- x: 2
y: 0
type: STR_HANGAR
- x: 0
type: STR_HANGAR
y: 0
- y: 2
type: STR_HANGAR
x: 0
- type: STR_SMALL_RADAR_SYSTEM
x: 4
y: 0
- type: STR_WORKSHOP
y: 0
x: 5
- x: 5
y: 1
type: STR_LABORATORY
- type: STR_LIVING_QUARTERS
x: 5
y: 2
- y: 3
x: 5
type: STR_GENERAL_STORES
Anyway, this is my super defensive layout
I studied it to waste the minimum possible of cells with the maximum defensive capabitities!
(in the end you waste only 5 cells, and the elevator is far from your defensive soldier line -> yellow arrows; top right circles -> proximity mines)