Self Directed IRA doing a mortgage note for a SFR purchase

[Buddy Holmes]

I am buying a SFR as an investment property. It is out of state and will not be used in any way personally.

I have a Self Directed IRA and would like to start trying out Mortgage notes.

Is it OK or prohibited to do a first and only mortgage on this property with my Self directed IRA?

So far one Trust Company says no and one says yes.  Help! experience?

Cheers,

Buddy