need suggestions on grow

Hey all, so newish to growing and want to do a sog with 3 mothers to start. I then want to clone each of the mothers 1 time. I then will use the new clones as mothers. I will then flower the 1st mothers. I am using a 600 w mh/hps regular reflector and am only using the hps bulb. Was wondering if anyone had any suggestions to what size my rooms should be. I was thinking of 5×5 for veg with 4 4' t8s and 4×4 for flower. The plants will be barneys 8 ball kush, barneys pineapple chunk, nirvana's kaya gold. Any feedback would be appreciated. Thanks