Yes, you can use a self-directed IRA for trust deed and mortgage investing. A self-directed IRA allows you to invest in a wide range of alternative investments, including trust deeds.

To invest in trust deeds and mortgages with a self-directed IRA, you would need to set up a self-directed IRA with a custodian that allows for alternative investments. You would then use the funds in your self-directed IRA to invest in the trust deed. The income generated by the trust deed would flow back into your self-directed IRA, allowing for tax-deferred growth.