One of them supposedly has a seizure disorder (she works full time), and they are continuously playing the "disability" card.  

Has had a condition that qualified them for short term disability.

The unscrupulous investor will:Have the homeowner sign a Quit Claim Deed in which the homeowner signs over their ownership in the property.Fail to explain to the homeowner that they, the homeowner, are still responsible for the mortgage.Fail to warn the homeowner that they could be violating their “due on sale clause” with their lender.The homeowner is usually elderly or part of an at-risk population (English isn’t their first language, disability of some kind, etc.).The Division advises the following when it comes to these types of rescue transactions:Don’t sign any documents or a deed to anyone until you have had a chance to talk with your lender and an attorney about your mortgage obligations and your legal rights.Colorado has a Foreclosure Protection Act that affords you certain rights when you are financially distressed.It’s best to take proactive steps when you first start having financial problems, and here are some resources that you can contact:Colorado Housing Connects – Colorado Foreclosure Hotline – Colorado Bar Association “Find-a-Lawyer” – Colorado Legal Services – Disability Law Colorado (Formerly The Legal Center for People with Disabilities and Older People) – Subscriber Services:Manage Subscriber Preferences | Help POWERED BY Privacy Policy | Cook

One thing you may need to look into is Qualified Disability Trust.

I now default ALL my 1 and 2 bedroom apartments to them since it's reliable money and the tenants are all in mentored job-training programs.If these girls have a permanent disability...then you should be looking at long-term tenancy.

However, it seems like this article is more about accessibility so you can't discriminate against disabled for family status in student housing.  

In Wisconsin: race, color, national origin, religion, sex (including pregnancy, childbirth, and related medical conditions), disability: physical or mental, age (40 and older), genetic information, marital status, sexual orientation (includes having a history of or being identified with a preference), arrest or conviction record, military service, off-duty use of lawful product. --- Milwaukee also adds on top of that: source of Income.)

The current tenant happens to be elderly, on disability and has had a recent surgery.

OR the 'I am or my child is now disabled and am approved for a vicious dog as my support animal. 

For example, people who receive disability payments are only allowed to receive X dollars a month and anything beyond that makes them ineligible to continue receiving benefits2.