I'm betting the Mapp Pharma, pharmaceutical company, paid for everything. After all, this represents an incredible opportunity for them to test their drug.
More importantly, they get public exposure and the government sponsor for their research will more likely resume this project. It was shelved due to budgetary reasons.
However, their project is not really going to be able to compete with companies like Tekmira who have begun human testing, having a much higher efficacy in Primates (and likely humans) and are simply further along.
Ebola would unlikely be a block buster drug for any company - however, it allows them to research technologies and systems for other, more profitable things.