I invested approximately $4,000 in furnishing these two rental rooms with linens, mattresses, bed frames, dressers, and nightstands.

Lots of these smaller philly row homes are actually being converted from a 3 bed 1.5 bath to a 2 bed 2.5 bath and are getting a lot more success on the rental and sale sideBecause 1100sqft in a rowhome style is super tight and that 3rd bedroom really loses its use to its size. some of these spaces can barley fit a twin bed a dresser.

We don't have dressers in our properties.

Instead of 2 nightstands and a dresser, go with a 3-drawer chest on each side of the bed that will function as both. 

Looks like a million bucks and takes just a few hours to do a whole dresser or dining table.

They have decently nice pieces from kitchen tables/chairs to dressers and beds and sometimes we even find couches or rugs.  

The bench in the bedroom is cute but a dresser would be more useful.  

There is another rental in town that is renting a set $600 per room, furnished with necessities (beds, dressers, sofas, and appliances...) utilities included and laundries.

I made some money selling items, but in the end had a LOT of things to deal with. 2 30 yard dumpsters, 2-3 dump runs filling a truck, and now have a couple tables, dressers, couch and such littering my storage trailer and at my house.

I am at the landfill this morning unloading some junk from my house ,  The guy next to me is struggling to get a dresser out of his SUV he is around 75 years old  .