At one point in my adult career I was turning over properties for other investors.  

If applicants are paying $25/adult (or more) to apply and you have a-priori decided that they're in the first 37% (and therefore have zero chance of being selected), you might be running afoul of local laws.

I think you are the adult in this relationship, since you are the owner and are ultimately responsible, I believe.

I've never got a completed app back with the $10 each adult from a deadbeat loser, pretty much anybody who got to that point got offered the rental.

The suburbs have a lot to offer from very robust adult sporting community such as softball, soccer, baseball, flag football to many trails and other forms of outdoor activity.  

If you have adult children for example, they may be the owners, mom and dad can be in the backroom and if anything happens to the old folks, you have less issues as internal arrangements simply fade away.

There are 6 people (4 adults and 2 children, I believe teens).

I believe my tenants use about 50 gal/person/day, including adults and children, and a coin-op washer/dryer.

In many cultures it is not acceptable for unrelated, unmarried adults of the opposite sex to share accommodations.

I also have Hispanic applicants and I don't speak Spanish, What I have found is that the Spanish-only speakers will have a person accompany them who will do the translation; sometimes an adult family member, sometimes it is even a minor family member, sometimes it is somebody unrelated.