Late rent again, time to evict?

[Carey Branam]

So I had new tenants move in the last week of July. They paid their first week of rent of rent upon move in (first mistake I should have requested the entire month of August at that time!). Then, August 1 comes, no rent. I texted them my address again and they said they would pay through their bank and I should have the check soon. In the lease I give them a 5 day grace period, but the 5th comes and goes. I text them and they act confused like the bank says its sent, its already been withdrawn. After giving the mail a few more days, they finally resend it. Still nothing, so she brings me a personal check with the late fee. Ok, I'm hoping this is a one time thing, I mean they have awesome credit so surely they pay their bills. On August 16th the "2nd" bank check arrives at my house. I texted them and told hem it finally arrived and asked if they wanted it back or if they wanted to use it for September rent. It was already the 16th so almost time to pay again. They tell me to hold onto it. He said to cash it on the 1st. I never responded because I knew I wanted to cash it on the 31st instead of waiting until the first and risking another late rent fiasco. So I took it to my bank on the 31st. I got a notice yesterday that there was a stop payment on the check. It didn't say returned check, it says stop payment. So I texted yesterday when I got this in the mail. They don't respond until over night. He sends me a screen shot of when he told me to cash on the 1st and says it's my fault for cashing on the 31st. (Which I never agreed to). Then he proceeds to tell me he will be sending another check from his bank because that's how the prefer to pay bills!!!! So this could take a week to get a check! He's also insinuating he won't pay the late fee or returned check fee. I'm just fed up. Mortgage is due today and having to pay an extra mortgage is going to be incredibly stressful. Do I need to put a 3 day pay or move notice on the door? There is no reason they can't write me a personal check. I live 5 minutes away! They just "prefer" to bank online. Well, I prefer to not pay for someone else to live in my house! Advice?