Be realistic in your calculation of how quickly you think you can knock this project out. While this wasn't my only priority during the summer, I did work on it quite extensively and it still took me the better part of the summer. This was my first project of such high complexity so if you have welding experience or have completed similar projects, you might move along faster than I did.
The point is... give yourself ample time if you are planning on having an unveiling party for your tandem. That's a great idea! The second point is... you should throw an unveiling party and invite your friends over for a ride!!!