The other side has someone in the apartment and has only been able to attract a rotating group of young adults.

If it is an area that is mostly adults without children then it might not be such a big deal. 

Up until last year, I spent my entire adult life (11 years) working in corporate america.

Up until last year, I spent my entire adult life (11 years) working in corporate america.

My  two adult siblings and I are currently looking to move out of our rental apartment unit that is too small for us.

They are responsible adults ...We let the chickens free range a bit but then realized my grass was getting jacked up.

Can an adult just co-sign contracts for me or can their name be on the contract and they sign and I just say that they are my partner, I have also read that a contact is legally binding if the adult guardian of the minor gives permission to the minor to enter the contract?

SEC 8 tenants lose their vouchers if any adult on their voucher has a felony or a drug conviction, so I don't think I would believe what your neighbors are saying. 

dont use terms like "not good for kid, or we prefer adults, ..... 

I'm thinking about selling a property I currently own to my adult stepchild (would trust with my life).