medical grow setup questions...

I will be starting a new grow in a garage that is 25x71. so that should be plenty large enough for my grow. my question right now is... im planning on having the flower be in rows, but would it be better to have 3 rows (4ftx40ft) or 2 rows (8ftx40ft). I will have each 1000w hps covering an area of 4ftx4ft to give me 62.8watt/sq ft and my lumes will be above 7000 per square foot also. i would be able to have more plants with the 2 rows but it would be harder to reach the plants in the middle of the rows.... the hoods will all be air cooled and i will have CO2 injected into the room, so a sealed room im still in the designing phases right now... i would love to hear every bodies opinions!

what advise do you have?
thank you

i know that its highly debatable... but would it also be better to have each light covering a 4x4 or 5x5 area in my planned grow? thanks guys and girls!

It's your choice till the end, but I would go with more light/plant any day.

yeah ill definitely be going with a 4x4 area of each 1000watter to cover but what about the rows idea?