Additionally, I would like to attempt to do the process Owner/Builder with subcontracting work out as well as doing some of the work I'm comfortable with (I have some experience with bathroom & kitchen remodeling an am not new to the construction industry).

I have made my own list of leads as well with some properties that I find vacant, probate, tax lien. but have only helped an out of state realtor on a deal a yr ago. and 2025 I would like to have the right people to go to with questions and or properties when I talk/find home owners that are willing to get rid of the property as well. 

They probably want to be certain YOU are legit.Most of the scams I've seen are by non-owners. 

Our area has a good selection of hard money lenders, and every now and then, you might find an owner willing to carry the loan, often at attractive rates.

Would I go to the current owners bank to see if they would allow a subject to loan? 

If you aren't paying cash and are doing owner occupancy you may be able to use FHA instead of Conventional with a higher down payment. 

Thus, they will contact every owner they can that has a rental being advertised, hoping the owner is tired and just wants to dump a headache of a property for 60-70% of market value.

We spend far too little time looking for small multi-family deals in this area for the reasons you listed although we would look closely at an off-market (perhaps owner financed deal).

This means you can sell, lease, or pass on the property as you see fit, just like any other property owner.Full Ownership RightsYou have the same rights as a Mexican property owner, including the ability to sell, lease, transfer, or mortgage the propertyLegal SecurityThe Bank Trust is a well-established legal mechanism in Mexico, ensuring your investment is secure and protected under Mexican law.Renewable TermsThe trust is set up for 50 years and can be renewed indefinitely, allowing you and future generations to maintain control over the property.Estate PlanningThe trust makes it easier to pass the property on to heirs, simplifying the inheritance process and reducing potential legal complications.Although the process might initially seem complex, it is entirely managed and supervised by a reputable banking entity.

Know this first:  the #1 reason that landlords fail is their failure to manage to the lease (American Apartment Owners' Assn).