Oracle vs. Tokens

I'm developing a solution to trace units of measure, say: apples for example, on etherum.. Then using smart contract to automatically execute when someone transferred x amount.. Question I have now is do I create my own tokens and issue them then burn them real life counter part, the apples, are consumed; or do I develop an Oracle recording the apples created on-chain so they can be used in smart contract? Weighing up the pros and cons of each, gas makes recording data on chain expensive but its only two integers say every 5 mins from couple hundred sources..