It was a former gas station in the center of a new and booming arts district, but even if they did the owners liability was 10k with the likely possibility of a windfall in the form of remediation management (sort of like insurance in the event of worst case).

I would find out who the owner is and write a letter to both, returned receipt, stating all of the things that your mother has done to make up for her breaking the lease, as well as legal remedies etc. 

(d) Default by Buyer; Remedies of Seller.

However, in my state, he has to provide in writing to your last known address an accounting of what the damage/cleaning was and how much it cost to remediate within 30 days and let you know the balance in 45, or if a shorter time is given in the lease then meet that.Normal wear and tear only includes things like carpet/pad getting smushed over time from walking on it, floor wear, sunlight fading, washers failing over time leading to leaky faucets, it doesn’t include insufficient cleaning on your part.

I'm doing everything I can to remedy the issue.

Should I get a mold remediation test done? 

Your obligation is to make a list of damages with associated costs to remedy.

You could wait 32 days and take possession using the abandonment remedy. 

I have no proof of what is happening here, but tend to believe the neighbor when she says my tenant is acting inappropriately.My conundrum is that I don’t know why remedy I have here.

The primary reason is that WY is one of the few states that offers the charging order as sole remedy.