How do I make a grid map efficiently?

I need to make a map using sprites that are 60px x 40px (3:2 ratio), 10k sprites in total.

For a long list of reasons, I'm avoiding a tilemap.

I could do nested loops (but that would be 56 deep and hard to read on c3 console), I could hard code it, use an array, just setup the sprites manually.

At present I'm thinking about using a mile long function and variables for on create points.

Not a single way seems very good for 10k sprites.

Any ideas?

Forgot 1, could use a spreadsheet and create a json for spawn points. Load that in an array and then run 1 loop.