i would say u want at least a 3 feet mayb 4 to work with depending on where the base of the plants is going to be, a 400 will be more then enough, a 600 will burn unless used with a vented hood. the veg area doesnt need to be as big maybe 2 feet or 3 with the mother. and that extra foot can be used for clones. good fans to use... get a vortex high cfm fan there quite and put a carbon scrubber on and thats it. thats pretty mUch a full set up.