moulding for toe kick- cabinets
I would prefer not to build out the front of cabinet before toe kick, although it may be the perfect solution in your case.
If you have a end cabinet that floor buts up to, building out the cabinet on end will not work.
I would be curious what baseboard you are using on the walls, might look tacky if you carry around the cabinets. If stain grade trim, might look pretty good.
If you trimmed the flooring close enough, You might get away with a piece of matching scribe moulding. Or just use 1/4 round.
If it was easy, we would not call it work!