@IEatBeans - FYI, A lot of Low Voltage Lighting uses A.C power as A.C. has less voltage drop.
The Low Voltage setups I am using are D.C.
A.C. could be used with the 12v to 5v regulators but would need a bridge diode and possibly a capacitor between the A.C. 12v power and the D.C. regulator.
Here’s a link to the beast of a Low Voltage wiring to remote cameras: