Regards,
Let me help you, I have experience in the development of prototypes from its conceptualization in a 3D model to its manufacture, so in addition to designing a prototype, the viability of its manufacture is also included.
The work can be done in 2 stages, the first stage according to the information you provide me; hand sketches, 2d plans, photographs, I will make a previous prototype, the second stage would consist of making the adjustments you want to the previous prototype, to enter a final prototype with your approval in the settings.
Waiting to be selected I appreciate your attention.
Sincerely,
Martin Gonzalez