You have no clue about the "facts". Diving to 80m+ is no big deal now. Hundreds of random amateur tech divers do that every weekend as a casual hobby. They typically own their own gear (not rental), which can purchased new for about $30K including training. The equipment such as a closed-circuit rebreather (CCR) and drysuit is somewhat specialized but widely available on the open market from numerous manufacturers. I know a number of divers living in that region who have done much more complex and challenging dives, although obtaining and using the explosives is a separate issue.