It’s very simple… 25% each to US stocks, US long term Treasury bonds, Gold, and Cash. Rebalance once a year. That’s it. The symbols are VTI, GLDM, and TLT. And cash? I’d use an online bank that pays some interest, or better yet, US Savings Bonds Series I at TreasuryDirect.gov
Scroll down the PortfolioCharts page to the “Withdrawal Rates” chart for these two portfolios. You can also design your own portfolio. PortfolioCharts is a free website and you don’t have to make an account or subject yourself to being spied on. The guy who made it goes by the handle “Tyler”. He’s on Twitter at @portfoliocharts
This portfolio is super low cost because it uses low-cost index ETFs. It’s reasonably tax-efficient. Maybe rebalance it after a year and a day, so you get only long-term capital gains taxes.
Clark won’t like it because of the 25% gold. He thinks 10% gold is an upper limit. The portfolio will still “kinda” work with 10% gold, 30% each to stocks, bonds, and cash. Again, try your own mix out at with a portfoliocharts custom blend.
Disclosure - I don’t use this yet because I’m still in accumulation, but this is what I will use when I’m quite elderly and unable or unwilling to be an active investor as I have been for 36 years. I can hand over the reins to my kids and let them run my money for me with them going nuts trying to do something weird and complex for Dad. I would not advise my 25 and 30 year olds to use this, it’s too conservative for them… not enough stocks.