CNC Machine specifications

Hello, I'm planning to make a CNC Machine in small scale as a project and want to have the following: 1- 30'' length and 28'' width. reasonable hight? 2- need specifications of all parts? such as stepper motors, Spindle Motor, MACH 3 Software, 3 Axis Cnc Stepper Motor Driver Controller, ball slides, ball screw etc.. 3- planning to use aluminum for the design. what is cheap and light? price and specifications? 4- I'm going to build it in 4 months. I want to have time schedule. example (see attachment) need references plz NEED TO GET IT DONE IN 6 HOURS!!