That sounds like a fun idea. LoyceV I think you have got merit on your own to create something like this. You might lack the skills, but that's what collaborations are for. Perhaps find someone who is experienced with creating paper wallets (someone like Polymerbit) and run your idea by them. And have someone trusted like minerjones determine the winners randomly and fund the winning tickets.

You could create like a thousand tickets, each costing 1 mBTC. That would give you a prize pool of 1 BTC, could be even greater if you could partner with one of the large gambling websites here on Bitcointalk.

I am not sure how legal creating your own scratch cards without a license is so you might wanna do your research on that.