I'd say go for it if you have the cash to burn and are ready to tough out the emotional roller coaster ride. Having forgone 2 application cycles with the stats of an average applicant, I get a little inkling of the "I could be almost done with 2 years of vet school" thought. I personally don't regret it though, since I knew I was definitely not competitive enough for my dream school at the time. I also think that for me, the past 2 years has been an incredible growing experience and that I am now a much more mature and stable person than I was back then, and feel absolutely sure that now is the right time in my life to start vet school.
One thing to keep in mind is the emotional toll it might have on you. There's going to be a huge emotional roller coaster regardless of whether you expect to get accepted or not. Actually, from personal experience and watching other people, I've seen people who apply to various programs that are out of their reach initially go in with the "oh well, I'm pretty sure I won't get in anyway so it's ok" attitude. After they've finished their application and they've gone a month after submission, for some reason, confidence seems to go up, and hope starts to well up. By the time decision letters are coming out, the same people sometimes convince themselves that they worked so hard on their applications and they're pretty happy with it, so chances are they'll get in. At that point, it can be kind of devastating when the rejection letter comes. Of course it's a moot point if you get in, but before you commit to applying, I'd assess how good of a rejection taker you are. If you know that you're a sore loser, or tend to take rejections personally, then I'd wait.