Although applications are quite expensive, the payoff if you get in is high, so I would encourage you not to let the cost of applications deter you from applying this cycle. Of course it's no guarantee that you get in this cycle, but the same goes for next cycle even if you substantially improve your scores. There are just too many factors at play, like who the programs that you are applying to are looking for this year, how competitive the files of people you are competing against look, etc. With that being said, I would encourage you to apply this year, and if nothing else you will have most things ready for next cycle. Best of luck!