The Zeropond guys have been very cooperative working with the community to establish trust, just have a read down their cloud thread: Zeropond Cloud Mining
On a long enough time scale there will be plenty of ZEC produced so I believe it will be very simple for you to buy some. But ultimately it is up to you to weight the risks/rewards of the different methods to acquire Zcash. Zcash and crypto-currency in general is a risk, there are no guarantees that any of it will survive long term.