If the smell is still an issue, maybe try out an ozone machine.

Another option is to hire a carpet cleaner with a truck mounted machine.  

My wife's company uses a machine shop there.  

Here's a tip @Asury Johnson, when nobody is immediately checking in to a STR after a cleaning we make the beds with the damp linens right out of the washing machine.

Your agent should provide tons of info on the 'machine' itself - ie cleaners, repairmen, service choices (ie cable, internet, pests, CLEANERS)... if they don't - why are you using them!?

I have been using the Deal Machine app for a few months and love it.

Competition across the street does have rents at our potential estimated rents but a few more amenities are offered such as pool, pets, vending machines, etc. 

If her home is close to the retirement home, perhaps people could stop by the vacant house on their way to visit grandma or stay there if they live out of town and are visiting grandma.I'd also disconnect the washing machine.

For example, give yourself 30 minutes in the evening after the kids are in bed and the house is cleaned (ie dishwasher is going, load of laundry in the machine).

Hit the Google machine to find thatThe main reason asset protection came to my mind first is because you said you have 2 businesses with all of these assets, so I inferred that you have 2 business entities.