Some struggle with addiction or mental illness, some are victims of abuse or have life long medical problems. 

EADO is great but I think that most of the fast appreciation has already occurred in that area, and your repair costs will only go up as the property ages and tenants abuse it.

I invest in helping and partnering with people that have the drive to become successful.There are very few parts of the country where there aren't phenomenal opportunities -- The only place I've refused so far is the Salton Sea area because it's like a post-apocalyptic wasteland.For example, I'm partnering with a guy I met here on BiggerPockets just four weeks ago that's in a little town in South Carolina that I've never heard of.He was convinced that this little town had no possibilities but I just jumped on Google Maps and started looking around to see what this little town had to offer.That's when I saw an equine therapy ranch that helps people deal with emotional and psychiatric problems like child abuse, PTSD, etc.

How about people that abuse drugs or alcohol? 

They are often abused, particularly when they are shared, and can be expensive to maintain.

With video of the students and a bus stop location, this is an easy case to solve.

SB 291 prohibits the landlord from charging a screening charge unless the landlord includes written notice to the applicant of the following:A right to appeal a negative determination, if any right to appeal exists;Any nondiscrimination policy as required by federal, state or local law plus any non-discrimination policy of the landlord, including that a landlord may not discriminate against an applicant because of the race, color, religion, sex, sexual orientation, national origin, marital status, familial status or source of income of the applicant;The amount of rent the landlord will charge and the deposits the landlord will require, subject to change in the rent or deposits by agreement of the landlord and the tenant before entering into a rental agreement; andWhether the landlord requires tenants to obtain and maintain renter’s liability insurance and, if so, the amount of insurance required.The following will require landlords to review their screening criteria and application documents.

The male adult commits domestic abuse against the female, gets arrested, and she acquires a PFA and gives him back his belongings under the supervision of police.

Castle Doctrine while fairly easy to read has lots of big lawyer words like forcible, aggravated, unlawful, deadly force, kidnapping, sexual assault.   

Granite/hard surface will take much more abuse but will cost much more.