Solid debate here.First, let's just note that OP @Charles A. missed a few checkpoints in due diligence, and that came back to bite him.

This has lead to what feels like my first checkpoint / gut check / challenge.

If I had to choose which of those three check points to slip on, I'd probably choose paying on time.  

Celebrate small victories and checkpoints in the remodeling process.

Make sure you hit the following check points your deal will be a complete success:!)

In addition to the Online Application and Tenant Screening services, CheckPoint provides a Lease Generation Feature that auto-populates leasing forms by extracting information from the application.

Set payment check points on completion of tasks and pay as they finish and you approve.

Keep it in mind and use it as a check point.

Wife also supplied receipts and invoices substantiating the hours she logged” - Source Checkpoint.

Are there certain check points a rehab property has to pass in order for you to invest in it?