Prototype design for wide view, WEARABLE low light or night vision device

I need a prototype design planned out (NOT created) for a wearable, battery powered piece of headwear to enable the user to see better in low light conditions.

There are a few important requirements -
1) Must be light enough to be wearable
2) Must use cheap components - wear custom components are necessary this must be kept to an absolute minimum - I envision the custom components perhaps being the container for the electronics, or attachments for widening the view field.
3) Must enable a WIDE view field. It does not need to mimic the human unaided view exactly, and the viewable angle does not need to be equivalent to the unaiden human visual angle (in fact it might be better if it didn't). However, PERIPHERAL vision must be simulated.
4) IDEALLY, 3D viewing and depth perception would be possible with 2 cameras - but this depends on the feasability of the other parts of the design.

I envision the prototype at follows:

- At least 1 smartphone to provide screen, with HQ camera sensitive to low light levels
- Fish eye lens attachment to widen view field (this may need to be custom depending on the level of distortion caused).
- Casing with mount to keep smartphone screen in fixed position, straps, and or other attachments to secure device to user's head.

A more advanced prototype would utilise EITHER 2 SMARTPHONES, with finely tuned orientated to provide the best simulation of depth vision, OR 1 smartphone with 2 camera, and the camera input arranged by prism attachments to provide the best simulation of depth perception.

In either case if the detectable light can be expanded outside the normal human range (ie, infra red detection) then this is a bonus but it is not required.

I require a detailed SCHEMATIC detailing the estimated cost, materials needed, and a realistic process flow for subsequent design iterations to arrive at a working prototype. DO NOT SKIMP ON DETAIL HERE, THE MORE DETAIL THE BETTER - every component, step, and process in the building of the device should be clearly laid out.

To be clear - I plan to build this device myself, according to the provided instructions - if there are issues that arise due to oversights on my end we can look at some further development. On the other hand if the device is not buildable according to the provided research and documentation, then this project will not be considered a success.

On the basis of the above paragraph I feel a fair milestone structure is as follows:
Deposit - £200
First draft - £100
Completed Proposal and specifications - £!00
FINAL MILESTONE TO BE RELEASED ONCE PHYSICAL PROJECT IS UNDERWAY - £200

Again, I intend the outcome of this project to be a set of instructions that can be followed to produce the working prototype.