No such thing as a permanent visa.
Work permit and residency visa are two seperate things. You can have a residency visa only but not work permit only.
Interesting article about Damac Maaad. I saw that the other day too. AED 10 bn is a lot of money to have lying around and I doubt they have that. I expect they intend to fund it either from an IPO (which they said was coming in the next 3 years) and/or selling off-plan. I thought that was how Emaar, Nakheel, UPP funded their developments?
If they've got one building complete, they're doing better than most. Emaar seems to be the only property developer that has completed residential buildings (for foreign owners) at the moment.
But as arnie says, without access to their accounts (they're not publicly listed BTW), it's difficult to really see how they're doing.