For some comparison, I have a 30x10 matrix of WS2811 bullets hanging on my front railing. Prices have risen, it’s $250 now. The 4" wire spacing results in a net that’s about 8’ wide and 3’ tall. Viewing distance is 20-60’.
You can see them do “graphics” in the rotating pumpkin post, and here’s what text looks like from 20 feet away (excuse the off-color message, it was a really frustrating night before Christmas trying to get some code working).