And I re-read your original post and see that they stayed at the last place with the evil landlord for 16 years?  

Sorry, I re-read the post and I see the $1k is for the leak.. 

But I re-read your post and you said he texted you the 9th which was a Monday to say he will pay by Thursday which is the 12th ( Thursday is probably a payday for the tenant) and after the grace period.

@Larry Hucks You know what, I re-read page 10 of the contract, and it looks like giving notice if you are selling the property is accepted as good cause.  

I literally  just re-read "Landlording on Autopilot" by Mike Butler this week. 

@Matthew Wyn, I just re-read this, and it sounds mean.

Hi: re-read my contract states Per the signed agreement I have with RPM, I have 30 days to notify termination in writing.

You can choose to be like me lending out someone else's money (blindly following the end-lender's / end-landlord's guidelines regardless of if it makes sense), or choose to do the right thing and re-read the above bold/underlined statement a second time.I have federal fair-lending law handcuffs on and cannot do the right thing re: FICO scores - I envy those of you that can.

I reread your post, and perhaps this would actually fall under filing for wrongful detainer rather than failure to pay rent:http://www.peoples-law.org/house-guest-or-squatter...

I just re read your question and I would follow that up with...since you are the seller have your attorney send the current tenant the 60 day notice.