You'll be subject to ordinary income and possibly self-employment taxes as well.  

Nothing out of the ordinary or hard to finance. 

Here is an excerpt from an article on the subject that I believe breaks this down fairly well:Gain, to the extent of the depreciation claimed that exceeds what would have been allowable under straight-line depreciation, will be recaptured as ordinary income, and, thus, taxed at rates as high as 35% in 2003 and later years (ordinary income rates), but the amount of excess depreciation subject to recapture may be less for certain low-income housingGain, to the extent of the depreciation that isn't recaptured as ordinary income, will be taxed at a rate of 25%.The balance of the gain will be taxed at a rate of 15%Example – In January 1986, you paid $1.3 million for an apartment building (not a low-income building), of which $1 million was allocated to the improvements.

If they are leaving, this is my inspection to determine what cleaning or repairs may be needed after they move out (either Tenant-caused or just ordinary upkeep).3.

Thx Do not forget that you have an issue of it being taxed as ordinary income if you sell plus SE tax.

That is a good way to gather information and be warned of anything out of the ordinary.

I am a Brit looking to start doing REI in the USA. 

All $ needs to be in place before they take occupancy -that is what we expect from 'ordinary' folk, why would we bend the rules for those who have shown less than an exemplary history?!  

Charge for all damage, and even for deep cleaning above and beyond ordinary wear and tear4.  

@Wayne Brooks is correct in that interest is taxed at ordinary rates.