No offense but, 45 plants for 45 days veg seems a bit drastic for the area your 1K can handle. From my experience a 1K is good for a 4'x4' area. IMO 8 -10 plants in 7 gal pots makes sense.
Sorry if you have started already.
You could do 45 w/ no veg using clones and do well. 1 to 1.5...