On the contracting/public-adjuster side we do mostly exterior storm-remediation work, and each year we have to break the bad news to at least a couple of our potential clients that their insurer is only going to cover say $4k of the $24k in work because they bought the cheaper ACV policy vs.

Does anybody have experience trying to remedy a broken contract anything similar to this?

However, many rent supply stores have them for rent and every insurance claim with odor issues (fires and water issues (mold)) includes there use in the remediation. 

Remediate the mold problem asap.

There are also remedies for that but it would probably be good for an experienced person to go through building and discuss options with these things in mind.

This one was remediated extremely well, and we are hopeful.....

Even if we were to agree to pay her balances on the taxes and HOA fees and take over mortgage payments, without equity there is no room for profit for anyone.

The previous PM/Owner did not apply for occupancy permits for more than 20 tenants with current leases.How can I remedy this?

Run that till you put her in a position that she can sell it to you at her balance or just act as an agent and try to pull a listing from it.    

Are there any remedies to this problem or does the purchaser own that lien now?