If you had also spend money on renovations and improvements while occupying those should have gone into service then as well. 

If they never lock themselves out and never access the key, then you won't have to change the lock. 

If you have little to no track record then you need to offer another 2% points.D.  

Adding mass to the walls works wonders—attach Mass Loaded Vinyl (MLV) to the shared wall, then cover it with a layer of 5/8” drywall using Green Glue soundproofing compound for extra noise-blocking power.

Then the prices lower towards the date and you end up booking at a low price or worse just being vacant.I think manually pricing your STR'S is a much better approach.So many people are looking for the next cool software app to buy a subscription to.

Then when a property pops up that works to your analysis in that market, make the offer. 

The financing will then dictate which markets are and aren't within your budget.

And then repeat.

@Nick Henry this also comes down to how much time you have available and how much effort you are able to put into purchasing a home or building and doing renovations and then finding quality residents to live and take care of your asset.

Then I just might make it my pet project of the week.