In this case, if you have a documented list of damages that the previous tenants have done, then this is fair grounds for you to deduct it from their security deposit. 

Trying to keep the logic simple if every house you own you can deduct 3 main categories on your taxes (property taxes, depreciation, mortgage interest) if I paid off a house I would make more with only two primary deductions.  

In my case the property is old, bought in the 1980's and was a primary residence for many years,(until recently), there would be a significant amount of money spent on capital improvements over those years that could be added to the 250K exclusion + basis that could be deducted in a typical residential sale.Therefore is that extra capital improvement deduction lost in the 1031 transaction ?

With insurance premiums for apartment properties increasing so dramatically in recent years, I am leaning towards trying to save some costs by increasing my deductible to the highest deductible possible.

Checking most recent tax year for tax prorations, instead of most recent mill levy (big difference since taxes went up 30-35% last year, $10k screw up I saw in real life by a buyer last year)3.

Some deductions allowed by the USA will not be allowed by another country.

Usually, there will be a clause that $150 will be deducted from the reno cost if you give them the job. 

This would give you a $250,000 deduction.

I collected a bunch of MTR comps on furnished finder, ran the numbers, and found that for one my typical 1 br/1ba places, I'd get maybe an extra 15%, but only if I allowed pets (all the MTR comps I saw had noticeably higher rents if they allowed pets...I don't know if that was just a fluke, but it seemed pretty consistent).  ...that extra 15% I found was after I deducted allowances for vacancy and the cost of furnishing the place (though, I'm not sure my vacancy estimates were accurate)... 

This is out of an article that should help you get your research started: A taxpayer may not deduct losses sustained in the demolition of buildings and their structural components.