This design requires proficient understanding of 3-D drafting, assembling and simulation. SolidWorks can do this quite well.
My bid for the overall project stand at 25AUD, which can be revised.
Relevant Skills and Experience
Graphic design, product design, material science, measurement and metrology, 3-D drawing and simulation
Proposed Milestones
$6.01 AUD - Using SolidWorks as the design software, I would make 2-D sketch of the bottom section and extrude
$5.01 AUD - I then extrude to required thickness and chamfer the edges.
$5.01 AUD - I then cut slots for speaker
$6.01 AUD - I draw the mid strip to required dimensions and chamfer edges. slots are cut for USB and ports
$3.01 AUD - I finally design the front panel with allowance for touchsreen, slot for home button and earpiece
Which material do you require for casing?