I will look into your suggestions. Thanks.

Todays smartphones are powerful, flexible, and affordable. There is no need for a dedicated hardware cold wallet as a smartphone can be turned into one.
Eventhough I myself have a Trezor underway but I see cold wallet solution for smartphones would benefit a lot of people.
I hope devs involve with bitcoin would look into this.

I will send an email to the organizer of the hackathon, maybe they can spread this idea around.