This appears to have been done when the ducts were fabricated! 

If vacant you need to:what is cost of dumpsters vs buying a pick up or finding some hauler to throw away all the demolition  secure and board up and add cameras, get roof bids, order roof parts, roof needs to get on the house ASAPclean out dry wall, everything fabric throw away, cut up and remove carpet, mop the studs and floor with bleach and water solution (5% bleach), inspect electrical - maybe some shorts or problems, order flooring for kitchen and baths and new kitchen cabinets (measure like you are OCD ten times), how is the sub flooring?

If one of our customers wanted to add those to an existing job, we could probably fabricate and install it for around $2k to $4k depending on hardware selection.

Most likely her whole backstory is a fabricated web of lies, but even if it isn't I wouldn't take her due to her response to fairly simple clarifications of her application.When you made this post, you already knew there was something amiss, right?

Sounds like they are trying to fabricate excuses to get out of the lease.  

Unrealistic fabricated burdens on the innocent is a sin. 

One culprit is that there wasn't a proper use of filter fabric during construction and sediment has filled in the voids between the aggregate making drainage slower. 

Any recommendations for metal fabricators would be greatly appreciated.

Leave a small boarder around the house, put down a thick landscaping fabric and thick layer of gravel. 

Had another we passed on because of a new city/town specific code requiring a $3,500-$4,500 Septic Fabric Drain Guard surrounding the leech field.