If I remember the video correctly, near the end when the focus turned towards resurrecting the Wardonclyffe decades later, they talked about Oatmeal and the indiegogo project and eventually the volunteers who came to help clean up the landscaping that was obscuring the buildings. There were some interviews with some of the volunteers. I watched the video before seeing this post so really couldn't say but I don't specifically remember any mention of Tesla cars being there (other than people who associated the name Tesla with the car--shown at beginning of the film when asked do you know who Nikola Tesla was). At the end when they were explaining how they reached enough funding to purchase the site, they did have a full screen video segment stating that Elon Musk had donated a considerable amount (think it was 1M).
The majority of the film was about the man and his inventions and his life but they did cover a decent amount of the Wardonclyffe resurrection effort and those involved and what was being done.
As for donating to the fund raising campaign, they talked about how they celebrated when they were able to purchase the site and the next day realizing that they now had a world of people to get t-shirts out to and what a monumental task that was for them. Showed a map of where donations came from. They mentioned sometimes they couldn't read the name of the donor or such other things so you might find that part interesting. Was your fundraising reward level a copy of the DVD? I know there was a group making a movie about Tesla but they didn't end up raising enough to go into production and if memory serves me they took the money they did have for the project and donated it to the Tesla Science Center for the purchase of the site helping them reach their goal.
I remembered some things about Tesla during his early days but nothing like what the film brought out. Fascinating guy. Makes you wonder if he had convinced Mr. Morgan or had Morgan not stopped others from funding him, what he could have accomplished. Great interviews through out the film along with photos. Interesting background about his work in Colorado Springs before setting up Wardonclyffe. Segment about using ground radar to search and locate the underground tunnels used in the tower project. Tragic how historical events like the Titanic impacted his life. Hey even Penn from Penn & Teller was on the film.