It does sound to me that a lot of that work should have come out of the tenants security deposit 

Hi BiggerPockets Community,I’m Jaedon, and I’ve spent the last few years helping clients secure business funding to grow their ventures.

All situations are specific to individuals.Our best wishes and empathy go out to those LA individuals and communities.It’s been about 6 years since one of our storage locations was flooded for about 4 months.  2 feet over the roof.  

I personally would not invest in detroit as historically its not a appreciating market and for cash flow and I invest primarily for appreciation - I go off the location location location mantra. 

I've collected thousands in security deposit from my guests who've caused damage.

Long term $ can range from 6's-10% range depending on all types of factors - LTV, location, unit count, debt coverage, borrower strength, full doc or lite doc programs, etc..

Nothing you mention is "ordinary" and you should charge for all of it. dodged a bullet there thats a very good price take it from the security deposit and call yourself lucky. 

While the co-signers add some security, the family’s newness to the U.S. and uncertain job situation make them a higher risk overall. 

I got the Discover It Secured card in high school and used that to build up my credit. 

I liked the tenant, school is starting back etc, I told them they could pay first month and security deposit and I would let them have the rest of August for free.