Money does actually get wired to the Kiva Field Partners. This from the Help Center at:
http://www.kiva.org/about/help/questions?subtopic=How%20Kiva.org%20WorksHow does the money get to the entrepreneur?
Loan funds received by Kiva.org are forwarded, by check or international wire, to the respective Field Partner on a monthly basis. The Field Partner then distributes the funds to the entrepreneur. Some of our Field Partners have working capital, which they forward to an entrepreneur when they see the business has been fully funded online, before the payment arrives from Kiva.org. This allows the business to start operating sooner.
What we know happens is that Kiva forwards funds on a net basis. Say for example a Field Partner is due a wire for $50,000 for new loans, but has received $17,000 in repayments due to Kiva from entrepreneurs . The two amounts are netted off and Kiva wires the $33,000 difference. I've read that a few times, can't say exactly where just now.
Some smaller Field Partners will not actually have the funds to loan out unless they get the money wired from Kiva, and the "cash-rich" ones will still want that interest-free money to loan out, no question.
As to money transmission costs, that's an overhead expense at both ends of the transaction, for Kiva and for the Field Partner, and no doubt they shop around for the most cost effective way of doing it. It would be entirely wrong for the Field Partner to deduct bank charges from the loan amounts handed to entrepreneurs, and I'm sure that if that were ever found to be happening, Kiva would step in very firmly to stop it.
P