I am lending out 0.0043 BTC here.
For trusted users with an appropriate reason for loan, then no collateral is needed.
For untrusted (negative and neutral trust) users, I would only loan them with a valid collateral.
Minimum interest: 10% for the whole period
Maximum period: 30 days
Appropiate reason to borrow 1 dollar?
Wouldn't be a reason for that m8...
Anyway good luck to you!
Regards.