We know the factor to multiply with: 2000
but what current does a single LED draw if red and green and blue led are fully powered?
Even if it is a standard WS2812 RGB this will be 3x15 mA = 45 mA per LED
0.045A * 2000 = 90A.This needs to be a real fat and beefy powersupply.
And as the current is so high: this would requires real thick wires 10 mm² maybe even 25 mm².
This is not handy at all.
So dividing it into smaller subunits makes sense to me.
Similar thought for controlling the RGB-Leds. 2000 is a pretty big number.
If all LEDs are all serially connected this means you need time to transfer the RGB-brightness values of 2000 neopixels.This needs some time. I'm not familiar with these details.
For powering dividing it into 10 subunits makes sense to me.
best regards Stefan