When you are new to staging and you want to stage unfurnished homes, it's expensive and difficult to acquire inventory.
One way to cut the costs of gathering an assortment of usable art is the purchase various sizes of blank, stretched canvas from your local art supply store.
Then, using a color palette that is pleasing to the eye and that blends well with your other furnishings you will place in the home, create your own artwork. Be sure to use the same (or similar) colors on more than one piece so that if you need additional art in a room, they will all coordinate well together.
Paint a dark border around each piece to simulate a frame; this eliminates the need to have the canvas framed, reducing your costs to just the canvas and your paint.
You don't even need to have the frame wired for hanging because even large pieces are light weight and can be supported on two nails in the wall. Place the nails 1/3rd the way in from each side for best support.
Subject matters that are safe and usually well received are: landscapes, colorful abstracts, florals, cooking subjects, words or phrases. Avoid painting faces.