You don't want to end up in jail, in contempt of court or with additional legal issues.

I am ready to go small claims court for about $7000.

Also, in a battle between experts, generally speaking an appraiser expert witness will have more credibility with the court than a real estate broker expert witness.2. 

They moved out peacefully, left the place sparkling clean, and thanked us for not taking them to court.  

Sure you can buy cheap junk software that will keep track like an Excel Spread Sheet or online programs, but when it comes down to protecting yourself with documentations in regards to an eviction, nothing will compare to QuickBooks when it comes down to evidence that you will need in a court of law.  

I haven't been through this situation yet, but I would look up on the local court dockets and see what your tenant is being charged for.

Can I sue over this in small claims court?

Lawyers representing the people she owed money to contacted us and asked if we were still interested in buying it through the bankruptcy court process.

Unfortunately, you can't charge the tenant the full amount because it wouldn't hold in a court.

Calmly explain that a court eviction will cost you money and time, and will harm his ability to rent in the future.I know that at this point, you want him out by the 10th and the new tenant in.