Inherited Tenants - Appreciate Some Advice

[Wade Garrett]

I took control of a fully rented fourplex back in August. It is my first time land lording and I would appreciate some advice on three case study tenants:

Tenant 1: Single lady with a very difficult personality. She calls me with ridiculous requests, including a noise complaint at 3:30am on New Year's Eve. She is also always late on rent. Today is Jan 10. She is due Jan 1, with anything after the 5th with a late fee. I have filed for eviction on her twice, yet she always pays up.  This is her third time paying late in 6 months. The previous owner filed for eviction against her right before he sold to me. And in 2014, she had yet another pending eviction from her previous home. She is currently on a MTM that I put her on.

Tenant 2: Single mom who is often short on cash. She is responsible, but she paid December rent on Jan 2, and obviously is late for January. I honestly believe she just has  hard time making ends meet. 

Tenant 3: Family of 5 (with more relatives living in the home). They also have not yet paid January rent, and owe $230 from a water bill three months ago. This is the 3rd time they are paying late in 6 months. 

I have filed for eviction on each of them at least once, in order to show them I am serious. But that, plus the late fees don't seem to be changing anything. I would prefer to keep the place occupied, but don't like taking a leap of faith for rent every month (despite the additional income). But I am learning.... you can't just force people to pay. 

Experienced landlord advice is appreciated. Thanks!