We contemplated it after seeing it in an issue of "Lowes' Creative Ideas" giveaway magazine, but realized that we did not want to lose the elbow room going through the door that would be taken up by two doors. (We had a 28" doorway which we had upsized from 24"; the two doors would have occupied about 3", nearly negating our expansion.) This would not be so much of an issue with your 30" door, of course, I'm just explaining why we abandoned the idea.

While you can cut a 30" door in half, the shortcut to getting those 15" wide doors is to order a 30" bifold door (there are some VERY nice bifold doors on the market these days - we got raised-panel ones in solid oak - if you look past what's on the shelf at the big box places). If you can, ask for it to be delivered without the center hinge, but it's not the end of the world if there is one: just turn the doors around so that the side with the holes from the center hinge is now on the jamb side instead of the middle, so that if any traces from filling those holes in show you won't be as likely to see them. No worries. If you want real french doors (meaning with the glass panes) you can order them frosted from some companies, or you can frost them yourself with adhesive film or do a faux stained-glass treatment with glass paint or Gallery Glass. Masonite makes some pretty ones that are pre-frosted patterned glass on top and wood on the lower half. I've also seen them with mirrors instead of the glass panes - not to my taste, might be to yours.

What we ended up doing was taking said bifold door and mounting it on the doorframe like it was a regular door; it then folded and swung back against the wall, occupying little space and requiring less swing room. I stole the idea from KGWLisa, who did this with a closet door. We also flipped the swing so that it swung outward instead of in, because no matter which direction the door went if it swung in it was going to slam into either the sink or the toilet (or the person using either!). We used a magnetic catch to keep it closed, but we could have added a decorative slide bolt if we needed extra privacy (this was a master bath, we figured if anyone else were in the house we could just lock the master bedroom door).

donnay your kitchen and bath what kind of style will be?
I can help only with contemporary looking :-)

A pocket door you gain 10 sq ft of space. If it was me, I would consider using a pocket door and making sure the framing was reinforced with steel. I dont think The cabinets will interfere with the cabinets other then the load weight.I think Reinforcement would take care of that.