You need not necessarily have a presence in the state where your LLC is formed.

Credit, Public/Court Records, Employment stability, housing stability, character, and online presence will all show the same patterns...either predominantly Good, or Bad.Make sure your Management Agreement is not incentivizing the PM to cut corners on screening.

You do need a PM or a very strong boots on the ground presence because of your distance from the property.

there is clear exception for ADUs in areas with a significant MF presence.  

In the town I live in, Rosamond, CA, there is a nice military presence and I would do my best to rent to them only.

I can refer a few local commercial brokers if you'd like but you really do need a better local marketing presence and property overview.

You lost control of the situation.The law requires you to give notice; it does not require you to get permission.Your notice should have made it clear that you will inspect on a specific date/time and that their presence is welcome, but not necessary.

Would the presence of mold, water damage and general inhabitable state of the smaller unit prevent a traditional mortgage legally?

However, physical presence may still be necessary for certain tasks, such as inspections or emergencies, which can be managed through local support or on-site property managers.

The inner core layer is usually composed of melamine resin and fiber board materials.Go to a few open houses for new homes in your area and see what they are doing.