A couch, few chairs, scatter pillows here and there, some plants and other decorative pieces.

In my market all the log cabins look the same right down to the same couches.

For example a couch in a living room, lets them picture there couch in its place and add their other furniture, TV, etc. 

Aside from the income that I miss out on if the property goes vacant, I've also found that rentlal units show better when furnished -- rooms look much smaller without a couch or bed in them for scale.

Wagon wheels, pictures of horses, log beds, antler lights, horse designs on couches, etc. 

This included 2 couches with end tables, coffee table, 4 chairs for the island bar in the living room/kitchen.

Originally posted by @Mic Nguyen:I also believe the expenses are too high.

I have a 2 Bed, 2 Bath property with wood floors, so the main concern with dogs is how they will damage my Lazyboy couches, or how they tax my cleaner. 

A couch, a bed, some chairs, a mirror, some curtains, etc.

The cat had pissed under the couch and the tenants never cleaned it up, so it rotted through the carpet, subfloor, and the smell permeated into the floor joists.