I did this in a bathroom using satinwood over a tile primer, both coats applied with a gloss roller which gives an attractive finish. It did look a bit scruffy after a couple of years, however it was a very quick job to put on a other coat of paint.
I would say go for it. You've got nothing to lose apart from a small amount of time and money. It will buy you time while you decide on a more permanent solution.
Make sure the tiles are clean before putting on the primer. You could use scouring powder or sandpaper for this.