When tenant leaves, the filter becomes property of the landlord or the tenant must pay to have it professionally removed and provide receipts of evidence. 

In this method you are looking for police removal and bypassing the eviction process altogether because after all he is squatter not a tenant.

If you buy something for the whole duplex - gas for the lawnmower, icemelt, a new roof, trash removal, internet... it is only 50% deductible since you cannot deduct these kinds of expenses personally.  

In order to remove that lien, by posting a cash bond, the money has to be deposited in the county court registry.

ADS FOR LOANS WILL BE REMOVED WITHOUT NOTICE.

All solid matter has been removed.

I think you will find the cost of demo and removal to be higher than you'd expect.

If so, how labor intensive is it to remove the smell and nicotine from the house (i.e. walls, air ducts etc), that is, assuming it's possible?

Email [REMOVED] and ask about their events.  

Remove the drywall.