I'd imagine any salesperson in a liquor store could help you find a dry (relatively sour/tart) white wine. Typically, it will be called something like a Chardonnay, a Pino Grigio or even a "table white" (usually a blended wine).
I'd imagine a bottle for cooking with would run you between $8-20, and you'd get several uses out of it. That will give you a decent wine for the purpose- not too pricey but not so low-priced that you'll get a bad aftertaste or a strong bitterness. You might even find you prefer drinking dry white wines like that if you're a beer/hard liquor drinker.
Personally, I tend towards local wines (I'm in Texas) like Becker Vinyards, St. Genevieve, Cap Rock, and so forth, for cooking. That's just because they're local, and I like to support the home economy when I can. I've also had good luck with Yellow Tail, an Aussie brand.
For drinking, I actually prefer German Rieslings or Eisweins and Italian Moscatos- generally fairly sweet wines- when I drink white wines, but I'd drink any of those brands' dry whites as well.
For the record, I developed the recipe as an outgrowth of a Cajun recipe which involved using beer instead of wine. That recipe didn't use veggies, though, and they used bargain beer.
That given, I'd imagine that you could probably get nice results with a wheat/blonde beer or similar lighter flavored, dry beer. I bet some of those imported Mexican (Dos Equis, Tecate) or Japanese (Kirin, Ahahi) beers would also work, too.
IOW, don't use Guinness!
As for beer...
Guinness, Shiner Bock and similar darker beers I reserve for marinades & ingredients for beef recipes. There used to be an Irish pub near where I live that mixed Guinness with their ground beef for burgers. Best damn burger I've ever had- I've not yet gotten the mix right, though.
And the Guinness/Harp brewery has a cafeteria that serves a Guinness marinated beef tips dish that is apparently the most popular dish in all of Ireland (based on how much it gets ordered).
Shiner Bock or Blonde plus your choice of seasonings makes a killer marinade for fall-off-the-bone ribs. (I usually mix in a bit of Worstershire sauce and lemon juice, FWIW.)
I haven't gotten around to trying harder stuff, like Sake or liquors, but if you find the right pairing, I'm sure you could get some cool results.
For instance, poultry and fruit flavors go well together- I bet a Grand Marnier sauce would go great with chicken!
As for checking the done-ness of the meat, I generally go by a chart in my cookbooks. (I have to look it up every time.)
I figure out the cooking time/lb and use that as my guideline. I don't check the bird's temp until I'm within 30 minutes of the suggested total cooking time- mainly because of that whole steaming thing: the fewer times you open the oven's door, the more humidity remains within the cooking area, and the juicier your turkey.
After trying this a few times, you'll be able to eyeball it a little, and you'll be able to get closer to estimating when your bird is actually done, meaning you won't have to check the temp as early or as often.
(Again, meaning a juicier bird.)