what would i need to have a year round system..

two rooms
two lights..
Both of everything.. is it just SoG. what is it harvest every 3 months thats 4 times a yEAR.. my plants are into ther third month growing under 400w its shit.. very slow... does anyone have plans to build a big cabinet that could house two grow ops. upper and lower.. only big for about 6 plants. or 3 Lstd plants..
I deff need to do it proper.
Peace
TBB