Trusts are not only for the wealthy, and not everyone needs a trust. There are different types of trusts for different purposes.
A trust can be established and all of your nonretirement assets transferred into its ownership immediately, or it can be established as a Standby Trust, ready to receive assets if the Settlor becomes disabled. In such cases, someone needs authority to transfer the assets into the trust. This usually will be the agent under a special durable power of attorney granting the specific power to transfer assets to a trust.
Trusts are governed by law and should be written so that they meet your specific needs and preferences.