Jay, I would really be wary of that 1000 mg per day recommendation. If you're that sick, you need to turn around. It's way better to spend several days (and nights) at a moderate elevation. That 1000 mg was the original dosage for glaucoma. I'll bet there has been NO study where hikers were given that amount.
By the way, even at sea level, when physically pushed beyond your limits, you can become nauseated and vomit. I've heard of guides in other situations pushing clients beyond their abilities, and it has always resulted in failure to reach their goal. You will need to go at your own pace, or hire a one-on-one guide who can extend the length of your climb to fit your abilities.
You can get the Pulse Oximeter on your own (they're $10 at Walmart online). But understand that many hikers' oxygen level readings drop really low when hiking at altitude. If you get one: When you are hiking, take readings of other hikers, so you can compare to your own.
