The price would be around 450€ for diving (2/d) and overnighting. The flight should be about the same. Assuming that we have to feed ourselves during the evenings at least, I guess rougly 1000-1100€ for the total trip.
Concerning rebreathers and tech-diving. In principle the dive sites are not to deep. The challenge seems to come rather from the positioning of the ships almost upside down. Here you may need some "cavediving" techniques rather than special equippement. However, to my understanding, we have the joice of "simple diving" with the provider as described or another option would be a full lifeaboard with all the fancy tech-things available. I will contact one I had in mind and see, but here the price might be different. I would like to see, how many divers are interested to join and then - like we did for Truck - decide, which of the offers we want to take. Please spread the word and have your friends registered so we get ahead.
Terveisin ja hyyva sulkeltatte, Rupert