As far as I know, TK providers don't generally negotiate on price, but there is no harm in trying.

I did, however, eventually evict the tenant for non-payment....so much for all the "extra" income.You could also explore switching to collecting 1/2 the rent every other week to accommodate the tenants poor money management habits.

As a landlord, you have an implied warranty to keep the place habitable.

It might work but eventually our bad habits catch up. 

People are poor because of poor thinking habits not poor work habits .

They can perform constructive eviction only if habitability requirements have not been met by the landlord.

It seems quite harmful to both the seller and the buyer, but great for the agents. 

Look at Detroit as a case study, it experienced a large population decline and price declines but people still rent houses there, the surplus housing was abandoned, fell into disrepair and is now not fit for habitation. 

The IRS has made it a habit of disallowing such exchanges. 

Option 3) Contact your local government department who deals with housing habitability.