I like this idea, it has some problems but I like it.
If you're not confident you can code this yourself, maybe you should do a pre ITO, creating waves tokens (easy as fucK) and ask for a certain amount of funding that will be used for the development of the smartcontract on Eth. If people like you're idea, you'll get the funding to realize the smart contract and then just give the pre ITO funders the same amount of HelthCoin as the amount of your waves tokens in their wallet.
Thank 's for your comment. This problem I'm fixed. I have programming experience, but not on Solidity and on PHP and on the initial stage I try to sort things out myself. But the pre-sale phase will be, I plan it after registering the fund, I want to give more guarantees to the first investors.