The subject of paper wallets has been covered before. See: Is there a way to generate ethereum paper wallets?
But I think the more useful part about your question regards the usefulness of generating multiple paper wallets with smaller balances rather than one with a single, large balance.
There are pros and cons to generating multiple wallets:
- You can store multiple wallets in different places, mitigating risk
- Protect against bugs that may rarely occur in private key generation
- Easier to physically exchange paper wallets with smaller amounts
- It takes longer to sweep 30 paper wallets than 1
- You will encounter higher fees if you want to make 30 separate transactions
- It's more difficult to keep track of 30 pieces of paper than 1
Basically, it comes down to what you want to do with your Ethereum later on.
If you're looking for secure offline storage for an extended period of time, I'd go with a single paper wallet. If you plan on using Ethereum for more frequent transactions, look into getting a hardware wallet like Trezor. Hardware wallets offer similar security without sacrificing liquidity or useability.
Also, for bulk key generation, check out the accepted answer on this question: Is it possible to *write* (not print) a paper wallet without having to copy a big JSON?