I have hand sewn parts of the X-Kilts that I've made. I'd say that it can be done, but given that you will be sewing down all the outer and inner edges of the pleats, this is going to be one LOOOOOOOOOOONG project if you hand sew it.

You see, the materials recommended for an X-Kilt are generally not those that hold a pleat well, and in order to maintain the pleats through machine washings, you will need to sew down these edges. I'd recommend, if you value your sanity, that you just find yourself a cheap, used sewing machine.

You don't need anything fancy for this. My machine is 20 years old, and does a fine job.

Be well,