1) that was to be anticipated, still 60% is not that much.
2) if you do it the way i described there is little cost: paper ballots, pens and cardboard boxes. also you can hold it in places, where you pay no rent as they are owned by the public like police stations or public schools and use volunteers. if 100million people stand in line for an hour, that is one hour they cannot work, so it might cost the country less to pay for a few more polling stations than to have all these people not working for an hour :-)