I used the nabers group to set up a solo 401k trust. From there I opened a checking account to transfer my contributions to and opened investment accounts as well. With full checkbook control I can invest in pretty much anything that can be considered an investment, from companies to crypto to real estate.

Just be cautious with investing in physical things like gold as there’s been court cases ruling that storing bullion in your attic where you have easy access can’t be considered.

I can also contribute a total of $132,000 (personal contributions + 25% of business income) for both me and the wife since she participates in the business.