Let’s step back for just a minute….
First, there is nothing illegal, unethical or immoral about purchasing a property subject to an existing loan. A note holder can NOT stop the owner of a real property from selling the property. Nor has the property owner promised the note holder that he would not sell the property without paying off the note. Any deed of trust or mortgage document that had these restrictions would be in violation of basic constitutional rights.
All the mortgage instrument says is that IF a property is transferred, then the note holder has the right to accelerate the note.
So, where do the problems, risks, and potential disasters come in?
IMO, if both parties are fully informed of, and able to understand all risks, and potential problems, then the subject to transaction has met requirements for a fair, ethical, and “proper” transaction.
This means that if the buyer has little or no capital reserves, or has ownership of 10 properties all subject to, or if notes are called intends to walk away from the loan, then this information is disclosed to the seller. Same if the buyer has the ability to pay off a called note for cash and would do so. Once the seller is provided with COMPLETE information, and assuming the seller has the ability to evaluate the risks involved, then it is the seller’s decision as to what constitutes an acceptable risk; whether their willing to suffer the consequences should problems occur; and what are their alternative course(s) of action.
I have been involved in a number of sub to deals, almost all of which were successful with few if any problems. However, these transactions were almost all between investors; I’m not sure if most homeowners are really able to understand the total picture. I would at least make sure to disclose all the negative possibility outcomes, and have them sign an acknowledgment.