Before dismantling the toilet, put some food dye in the tank wait a few minutes for the color to disperse and then visually inspect the bowl to see if any of the dye is coming thru into the bowl without flushing the toilet, if you see the color in the bowl, time to change the flapper or entire flush assembly.Also, check all the interior and exterior faucets/spigots.  

The bad part about furniture is the possibility of it getting stained and ruined so buy cheap and be careful of your selection on color and material.Hope this helps.Jared

Your typical home buyer doesn't care about the cap rate or potential income from using the property as an STR or even an LTR, they care about the character of the neighborhood, the quality of the local schools, the commute to their job or proximity to family, the finishes, the floor-plan, updated kitchens and baths, the paint color, the yard, etc. 

Not all markets are the same color.  

Install vinyl wood plank flooring (not sure on color yet), instal recessed lighting and a few other odds and ends.

A lot of people get this wrong, or at least look at this trough rose colored glasses.Take your market, start at the top with A and devide it in 4 segments.In Milwaukee an A class newer single family 500-700k (because we are generously exclusing the luxury segement).

I've done this as well, so I can provide a bit more color on everyone's advice to farm info from Crexi, etc.

Are they the same color top and bottom?

At move-out, the tenant shows his true colors.

I prefer them to have electric stoves, and electric water heaters--two less things for them blow themselves and the other units to Smithereens.Those coiled gas lines do leak from time to time, and the other things I don't like in the units are candles (open candles or religious candles in a colored glass from the local grocery store) or live Christmas trees.