Well, I'll tell you what I think you can do.
I actually applied 2 years ago. This was after my freshman year in college!!
Crazy, but I am actually really glad I did.
Most of the schools state that you need at least 90 semester units. That means when you matriculate you need 90 units. But to apply it doesn't really matter. So I had about 48 units when I applied. The problem was that in order to take the rest of the necessary units I needed to take summer courses galore, but also needed to study for and take the DAT.
So I tried it and took the DAT before having taken any OChem and only 1 semester of Gen Chem. I only got a 17AA on the DAT. I truely believe this is why I didn't get any interviews that cycle. So the next year I had much more time to study for the DAT and thus did pretty well.
Due to all the classes I took early on, my GPA was not that great (3.2 when I applied) but was apparently good enough.
So for you I would say that you should just go for it. You are probably much more mature than I was at the time (though I was certainly motivated) and I think you can do it. I really believe you can get in after a couple years like you say.
I don't know what kind of classes you have already taken or how many units you currently have, but honestly you really only need to take Bio 1/2, GChem 1/2 and Ochem 1 before you take the DAT.
So having said that, you can take Bio 1 and Chem 1 at the same time. I was able to take Chem 2 and Ochem 2 concurrently (this is very rare though and you will likely need to appeal to do it). If you can do it then you can be ready to take the DAT in 1 year, then apply and finish the rest of your science courses during the admissions cycle.
I would say that you really need to get a solid 21 or above on the DAT w/ no real weak points on any one section.
Good luck to you, you can do it!!!
PM me if you would like me to explain something better or have any more questions.