After 40 years it was way to cluttered to sell, plus 4 adults and grandkids in a 3 bedroom 1 bath house, 900 square feet, it was fully packed.So, long story, but a problem with long term tenants is they don't always leave willingly, even with months of notice. 

So six kids plus adults is two many people in the home.

My husband is a piano professor and I'm an English teacher to Spanish kids and adults. 

If they have low credit and no reserves, I’d only rent to them if there are two or more working adults in the home.

@Ted Klein combine income and put all adults 18 and older on the lease jointly and severally.

I had my last rental for next school year get rented this week, and I took a group of young adults that weren't in school over students to hedge against the unknown, like you are referring to.

I cant imagine that your prospect roommate's wont know what your paying and then ask why you want them to pay more.You may also run into issues with the landlord by allowing adult occupants to live in the property that are not on the lease.  

There's no way I'm taking that person beer to schmooze them into behaving like an adult. 

But, you'll have to let me know by X date if you decide to take that option, and we can put it in writing,"What helped me when I was first learning to do this, was to picture a childhood adult figure I knew I could never pull one over on, and that their word was final.  

Even if it's been removed/remediated, you still have to provide the brochure due to the age of the house.I've never had a problem; my tenants (adults) know better than to chew the woodwork.