That said, I'm not willing to toilet bowl the price just to get bodies in there; I'll leave it empty first. 

We have a tenant that complains about the smell of Mary-jane being used by a couple of the millennials, BUT he continues to sit on the outside steps & smokes roll your owns. 

It has a 2,100sf home on the property, horse barn, pasture, rodeo ring, and backs up to a small body of water.

They just had to treat it for the smell. 

Place a couple of fliers and cards in around the home, as well as have open house with their cookies and lighting candles making the house smell like vanilla wafers, blah, blah, blah...

Some of these foreclosed during the bust, presumably due to extended vacancy (which can happen just because your property manager doesn't ensure you're marketing a clean, fresh smelling product)  The Austin American Statesman profiled one California investor who let her house go into foreclosure after a washer hose broke, flooded the place, tenants moved out, insurance took a while and the vacancy and insurance deductable took its toll.  

Had to keep the windows open for a couple of weeks to get the smell out, long story.Same as others bought 1991 records for 20 years.The numbers: Cleaning and maintenance 10555; repairs (capex lumped in) 48953.10555+48953=59508/20 years = 2975 per year or 248 per mo.This building is in excellent shape too but original water lines and some dry rot in and under the porch.

Or costs to remove the smells?

My tenants rented the house sight unseen and complained of an unidentified perfumy smell that they said was making them have headaches. 

As I mentioned, I have a water filtration system that will filter up to 500 gallons per day from ponds or rivers or any other body of water.