[turbo6bar]

I like tabs' idea, but brokerage fees will eat up a fair portion of the investment. The best trading fees are ~$7 per trade, unless you go with one of the ultra-low fee brokerages like Interactive Brokers. However, IB has a hefty minimum balance.

I believe a plain vanilla Index or Total Stock Market fund is ideal. There is little to manage, and your return is equal to the market.

I would not use I-bonds for long-term investments. Your return is only 1% over inflation. For protection of assets, I-bonds are great. For wealth-building, I'm not so keen, but that's just me.
jurgen