IoF certificate

I am a freelance trust fundraiser and am thinking about doing the IoF certificate to boost my credentials. I am slightly concerned that my experience is going to be too limited to put together the required portfolio. I spoke to my local mentor and he was a touch cagey about giving me a complete list of what would be required. I wondered if anyone else had done it and could be a bit more specific. After all, it's a lot of money and commitment to put towards something, so I want to be sure!Any advice appreciated!