Ignore the list price and multiple offer threats.

Lastly, beyond 2030 is yet another threat we will have to face and that is A.I. and robots... yes robots.

I don't want to say and do something that is not allowed (that is, to charge them late fee for paying deficiency CAM amount since the lease doesn't actually say it), or give empty threats (that is, to tell them that if they don't pay by an XX date then there will be a YY late fee but then will never reinforce it). 

The threat is they sell and come after me for difference in my purchase price at auction and their sale price.

They have vetted and disclosed their processor, they maintain a strict cyber security protocols, etc.

We went with butcherblock countertops because they were on a Cyber Monday special from Menards and we could install them ourselves. 

It is currently on the market for $119,000, though after seeing the property it does  need a substantial about of remodeling not to mention 8 potential tree removal that are hovering over the house and may pose a threat to it in the event of a bad storm.  

You will probably find some tenants say the toughest things and will never comply; lawyer-threats and everything, until you give them the N-day eviction notice.

Do not let her threats bully you.

You will likely have to use the threat of her losing her welfare to motivate her to leave.