Individual Concepts:
Garrett
The design is a simple one. The motors should be able to provide enough power to move the vehicle. The minimal materials not only is cost effective, but it also makes the vehicle lighter and easier to move.
Vincent
This vertical design keeps the weight condensed, close to the wheels. This design uses minimal metal materials which will cut down on the weight as well, with the motors facing in opposite directions we should be able to have enough push/pull from the two of them to move our AEV.
David
This design is meant to be small, light, and compact. The arms with the motors are angled up in order to reduce the width of the vehicle as well as drag and potential torque.
Cole
This design was one based more on style then substance. The design, heavily based on the Star Wars ship Slave I follows a vertical Arduino setup similar to one model seen earlier on this page. Its vertical nature is to set the weight at the base and allow the propellers free range and less mid weight as they are in the middle of the ship without much weight beside themselves.