We do not know if this is true, feel free to disagree:Essentially, really fat people have a lot of difficulty passing waste when sitting on the toilet.

This may be a little longer process, an aural contract is still binding as far as I am aware, and an attorney will fix it.

I only do month o month lease because, as you're learning, a long lease isn't truly binding on a tenant. 

I found they tended to get fat and happy after awhile.

Also the lease tells binds me to get insurance.

A deposit to hold is often a small deposit made early in the deal to bind the tenant and landlord to one another in lieu of full payment coming later.  

How would you bind them to paying the lease if their name is not on it?

You also have a legally binding lease contract, follow it.

Having expensive car loans, even having expensive cars is for fat cat rich investors. 

This excerpt is from the South Carolina landlord tenant act:“If the tenant does not sign and deliver a written rental agreement which has been signed and delivered to the tenant by the landlord, acceptance of possession and payment of rent without reservation gives the rental agreement the same effect as if it had been signed and delivered by the tenant”Unless I am mistaken, if this case was in South Carolina, her paying the new rent after you’ve delivered a signed lease would effectively bind her into the new lease, even if she didn’t return the lease signed.