And if I were to open a dive centre in Greece, I would first look at the electrical power availability (in 3 phase 380-400 volt 50Hz and the amps available on the breaker) at the building premise location and second the numbers of cylinders I am required to fill in a day (especially if I had the notion of even the hope of using a Coltri for this application) .
Third I would consider the location of the compressor air intake in relation to any other buildings works or roads nearby and finally any consideration if say its got a hotel next door and I'm up till three in the morning jamming tanks all night for the next days diving on a Coltri MCH 6 or alternativly looking for the parts I dropped on the floor off the Paramina or Alkin as it shakes itself to death after 400 hours running from new. Hope dies last. Just sayin LOL
Oh, there's no way I'd have something like the Coltri MCH6 at my dive op. That's just for my garage. I like the idea of getting a used one, taking the course of the earlier link, tearing it down completely, rebuilding it. Maybe sell it, buy another one, tear it down, rebuild it. Rinse and repeat until I get sick of it. Move to Greece (of the 5 dive centers I have spoken to, all use the Greek compressor), buy one new one, one used one (2 is 1, 1 is none). Tear down the used one, build back up. The season in Greece is basically May to October, just half the year, so I wouldn't be scrambling.
I am looking at buying property on Naxos, as it is growing. Even if I were to not open a dive center in the end (which would be a real shame for me), I'd definitely turn a profit on reselling, especially if land around is all developed. Though there is a hassle of taxes and all.... But at least I know a real estate agent on that island.
Parts from Paramina are available next day, unless you are on a really remote island. Paramina would just put it on a boat, and I'd pick up at the ferry docks. The ferry traffic in Greece during the months of good weather (and therefore tourists) is considerable. I'm not worried about parts at all. And I'm hoping to foster a good enough relationship with other dive centers is that when one dive center's compressor(s) are down, we help fill each other's cylinders. We are not each other's competition. We are in the hospitality business, just like hotels and restaurants. Do hotel owners say "oh the Zeus Hotel has bedbugs"? Or restaurant owners "Zorba's Gyros adds cockroaches to their meat!" I'll definitely offer assistance. I do know my place as an outsider.