I've been talking with Roberto about the rewards and we've come up with some ideas to help achieve our goals.
We will create a list of available merchandising (or merchandising we could fabricate before Jun-2016) in order to increase the number of rewards, i've also noticed that most campaigns have several rewards in the $1-$10 range without any reward, for people that just want to help the cause.
The rewards would need to be approximately 20% of the final price the backer pays for the reward (including shipping costs) and we could create packs of rewards for people that want different rewards and give a little discount on them to encourage the backers.
We could also create a website and put a "Hall of fame" for backers that give a significant amount of money and we could put their photos and/or names on it.
Put some autographed 3D printed designs at a higher price.
I've seen dinners with the designer, CEO or other team members as rewards, in the $5,000-$10,000 range (plane ticket not included) or even a ride on the car once is finished.
I really don't know if this would be possible, but we could expand the goal of the campaign and put one car as the reward.
As for the publicity of the project Roberto had the idea of making contests in social media, and give prizes to the people that has the most likes/shares on their posts, I think it's a great idea to make the campaign go "Viral".
We should also make contact with USA investors using LinkedIn to let them know about the campaign.
This are just some ideas and I would love some feedback about them.