To some degree, younger adults face the same dilemma. 

This is the sort of petty little dispute that judges hate and adults should know better than to allow to fester.I would talk to the LL and express this concern.

Public pools restrict hours all the time and often restrict children hours to create a time for lap swimming, water aerobics, or other adult-related activities.

There's also remote notaries and if permissible from the lender, they would be a able to perform that via webcam. 

What is more heartbreaking is the masses of people who don't have a future because nobody taught them how to be responsible as adults.

I have a tenant (2 adults, 2 children, 1 dog and 1 car).

I'm talking we moved two adults and two kids into a 2 bed 1 bath 900sqft home. 

Your tenant can be an adult and talk to their neighbor in a friendly tone and discuss the issue.

One of our tenants (“Tenant Alpha”) wants to renew his Texas lease for a second year and move his two adult brothers in to replace his (now-ex) wife and (now-ex) father-in-law, who all moved in together about a year ago.

Roommates are great during your college years, but when you are a full grown adult working and living life, you don't want to be sharing space with strangers; I sure didn't when I moved out of my parents house.