Hello Mein Herr !
I don't know much about Haeco and I was in fact thinking about it myself; however, a colleague of mine working in New-Caledonia as a MCC was offered
5500€/month, including family allowances for working there also as a MCC. After careful consideration he told me that he finally decided not to join that company as it was not worth it considering the local cost of living. Hope this help Mein Freund