Hey Don,
Thanks for your concern but I'm quite sure that I want to make the trip. I have read about blue hole and it seems like such a wonderful place to dive, I'm really looking forward to experiencing it with such a great group of divers. That would be great if Stella has tanks for rent, would keep me from having to bring them. Please let me know what you hear for sure about that.
Stella definitely has tanks to rent--that was not Don's question as I understood it. I think he was only concerned if he was right about the pricing. I am certain (as he is) that her price is $5 for a fill ($10 for doubles, regardless of size). The question is whether or not there is an additional fee for renting a tank as well. It has been 4-5 years since I had any interest in renting a tank there, and if my memory serves me correctly, I paid an additional buck (up to a whopping $6) for it.
I am pretty sure that if those prices hold true, it will not have a dramatic impact on your decision making. I don't know any place in the world that can match those prices (other than filling your own).