I need a loan of 0.00003 BTC, have nothing to give in a pledge. Maybe someone will do it
At this very moment, the optimal fee is 360 sat/byte. for an average transaction this comes down to ~81.000 satoshi's (
https://bitcoinfees.21.co/).
You ask for a loan of 3000 satoshi's...
The fee a lender would need to pay for a speedy confirmation would be 27 times the loaned amount... If somebody would "lend" you 3000 satoshi's, there would be no way you could ever spend that input (since the fee needed to spend those 3000 sat would be 81.000 sat) I strongly discourage users from using faucets (they're a waste of time), but in your case i'd make an exeption
Unless the lender sends it without fees, as in nada, 0! Though it will never confirm though.
OP seems to be a real newbie in the bitcoin world, I would suggest you read up on things first.
