bitcointalk has become quite bitter... jeesh
OP, it's not possible for you to find a loan of this size if you don't offer collateral, i'm afraid. There are enormous risks tied to this...
You have no trust on this forum, 6 BTC is a lot and 40 days is a long time (especially in the bitcoin world)
Well, perhaps we have joey to blame for that, and all the other people who didn't try at all who got big bitcoin loans.
The internet is paranoid, sorry man.
Really, this loan will not happen unless you provide a collateral.