It allows tenants to increase their credit scores by an average of 60 points, and I provide it free of charge.I have over 600 adult tenants.

Be conservative and don't rely on young adults to pay their rent.

So things like, xbox/playstation ping pong for the kids maybe a turf strip to play some putt-putt for the adults etc...

For example, I mention that every adult must pay a $30 application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.

Do you screen all adults in the household or just the person paying the rent? 

Looked up hotels and I see $350-600 per room per night for 2 adults and 3 kids.

If he qualifies, create a new lease with all adult occupants (and a sublet provision) and get it signed and place it in a known location.good luck 

Myself, I've made millions with Section 8 properties, but every day you need to suit up for battle to deal with tenants who have no sense of adult responsibility.

Verify and double verify with the applicant that the information they have provided is correct and that all income is verified and all adults will have a background check. 

For example, I mention that every adult must pay a $30 application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.