I have to agree with your husband . he is putting the family safety and security first . 

I have read David Greene’s book on long-distance real estate investing, but my guts tell me that it won’t be that straight-forward as outlined in the book.I think the sweet spot are properties that haven't been fully rehabbed, but that have had structural, safety, mechanical and are updated cosmetically enough to keep the tenant happy.

I've done dozens of FHA deals, and as long as your property has no health/safety issues, adequate electric service throughout, decent roof, solid siding, handrails where needed, no cracked walkways, no termite or carpenter ant damage, you should be ok. 

Take care for your own safety and that of others.Good luck!

Should I remain patient or should I have concern that this process is taking way too long and maybe try to start finding other people to partner with?

I have been very patient with company they have yet to repair storm damage inside of the house .what can I do

The landlord is responsible for the safety/maintenance of the structure.

I know alot of people who get treated for depression or some sort of mental health issue and gets a letter from a licensed doctor or therapist that allows the patient to have an ESA.

I'm referring to major life safety violations or fire violations.

You have a wife and child--you need a safety net first.