Yeah, instead of worrying about keeping a mother, just cut perpetual clones. This means cutting a couple of clones from a female before moving it into the flowering chamber. You can SCROG and still do this at the same time, as long as you have access to a spot for your container to sit. A mother would likely outgrow your area.

To be honest with you, with a cabinet that small, you could probably grow one plant that fills the entire thing up. Its all about what style you want to use.