Since I have been diving rebreathers I heart so many times that rebreather diving is extremely expensive. If you look at the price you have to pay when you buy a new closed circuit rebreather, diving lamp, dry suit analyzer filling station underwater camera etc etc, YES it is expensive. But there is another side. Suppose you dive open circuit, you will have the same problem. You also need diving lamp, dry suit analyzer filling station underwater camera etc etc. The additional cost is the rebreather. I tried to explain that when you use the rebreather in the right way it can even be cheaper than diving open circuit. These days on most tropical destinations oxygen, sofnolime bottles and weights are available. I made a trip to Egypt and took my rebreather in parts without the bottles and without sofnolime. On board there were filling facilities and sofnolime for sale. When you look at this table you might be surprised to see that if you look at the cost price per hour diving closed circuit is by far the cheapest way!