How Much Space Needed for 2 400w Hps & 1 250 Mh

whats going on farmers im new to the community but have been growing my own meds medicinally for almost two now, and I have grow variety of strains now i have my keepers and wanted to upgrade from my 3x4 tent and build another D.I.Y tent for the extra 400w and 250mh and have all three running.

1.) Now how much floor space is needed?
2.)How many plants you would run?

Oh yeah I plan to run all my strains in 3 gal. pots with a 6-7 veg.
So you can get a better idea im running bubba kush,Nl5,trainwreck for as indica and all the strains listed are short squat phenos but put on alot of weight and loved to be lsted.My sativas are Sour diesel and A-Train.

i run 2-400 for flowering and have a space of 4' X5' with a small exhaust fan on the outside and have no problems with heat in the winter but i do have them in the summer. i have run all 12 plants that i am legally allowed to grow thanks to Michigan voters :thumbsup: and they did very well under the 2-400 's but i am sure you can fit more with a nice reflective wall and painted floor.

so i'll be able to run 2 400 and a 250 with no problem