I would say don't even bother trying to gain residency. There are ten thousand hoops and its a giant pain in the butt. Instead, I would focus my energy on bringing my grades up to a 3.5 or above. Getting very good grades will make it easier to get into a vet program outside your state. Do research on what schools accept lots of OOS students- ohio, kansas, mississippi...some others. Apply to the schools that let in lots of out of staters and don't bother with the ones who never look at out of staters unless your grades are AMAZING (above a 3.7- ie colorodo, washington, davis). really, it just come down to getting vet experiences over the summer and winters and getting your grades higher. As long as you do both, you should have a shot at getting in somewhere.
I guess there's two schools of thought on this forum, which I think both work but it really depends on what your priorities are whether you choose one of the other. The first was just described above. Applying to as many places as you can that's reasonable with your stats during your senior year, and hope that it works out out of state. There's absolutely nothing wrong with this, but it can be very expensive and heart wrenching... and if you don't get in the first time around, it can be very expensive x2 or x3.
The other approach is to finish your pre-reqs and really focusing on just maintaining a competitive gpa, and then taking a year or two after college to gain residency + diversified experience. Especially in your case, since you said you had a late start as a pre-vet, I would suggest this latter option. It really takes A LOT to get most of your pre-reqs in 2 years (if you're applying your senior year, you don't want to leave like 6 pre-reqs for your last year in college), maintain a good GPA, rock the gre's, and get thousands of hours of diverse animal/vet experiences. The application process is very involved to begin with, and if you're still trying to get through a lot of important prereqs your senior year, either your application or your gpa is going to suffer. (actually just thinking about what you'll have to do in order to apply your senior year is making me want to vomit).
If you just focus on your academics during college (and maybe get some experience), you're on really good footing to get some quality experience while you establish residency in the state that has your dream vet school. Then when you do apply a year or two out of college, you'll be READY! I personally deferred applying for 2 years to gain research experience and I don't regret it at all. This is my first application cycle, and I don't think it could be going any better. I think it helped going into interviews with a "pssht, I know I'm the sh**, you'd be crazy not to take me!" attitude as opposed to the "

please please please? I know I'm not as qualified as some of the other applicants, but I think I'm about or a little above average???" (which is how i would've been 2 years ago)
I was able to raise my gpa from a 3.4 to a 3.59 in just my senior year so the gpa adcoms saw when I finally did apply was much higher than they would've seen had I applied earlier. And honestly, I feel soo much more mature at 24 than I did at 22, and have gained a lot more perspective on not just vet med, but life as well. That, and at 24, where I live = my residency. Otherwise, I'd have to go with my parent's residency... which is on the other side of the globe.
Lots to think about, but I wouldn't worry too much about it now. If you find that you ARE ready to apply your senior year, go for it. If not, the worst that can happen to you is that you decide to wait another year or two. Just think about the investment you'll have to put into each option in about a year (there's not much you can do right now anyway).
good luck on this terrifying yet super exciting journey!