Tell me where I messed up?

[Katie Williams]

I’m obviously new. I don’t know if I messed up or just happened to grab the best rotten lemon tenant. 

I purchase 4 units. 3 of them already filled. 

I did the best screening I thought. 
had them pay to do the credit/eviction/criminal/ personal check. 
everything came back fine! Zero issues. She proved her income. No evictions or criminal. I called her previous landlord where she lived years. No issues. 

She seemed very courteous, paid her deposit. Paid her prorated for March (10 days). 

Then hell. 

April 1 - no pay. She wrote 3 bounced checks (thanks Innago) I finally got card payment april 23. She didn’t not pay any of her fees. (3 NSF and 1 late fee) 

May 1. No payment. I reminded her she has until may 3 to submit CArD pay. 
May 6 she pays with a check. It bounces. 

I just got back from courthouse filing eviction process. 

Only thing I will do better next time is - get previous previous landlord and ask them. 

But other than that? What can I do differently? I’m feeling so discouraged. Only 2 months into my journey and I’m feeling so worn down. 

Was this just a bad tenant that just happens? Or do I need to learn some things?