Family portrait, when you can't have the all the family in one place at the same time, spells out Live Well, Laugh Often, Love Much :) they're on individual 8x10 canvases, squeezed together for the pic, but spaced out on the wall. This is my family
For a more elegant effect, you can consider printing black photos and hanging them using metallic clips on an interesting looking wire. You can do this by adding a neutral white photo canvas (in a digital processing computer program) like in the example above or by printing the photos as they come out of the camera. With minimum costs, as you can imagine. [costs: under $50]
Another interesting idea is to alternate black and white photos with color photos. Print them with the same dimensions and shape and create a symmetrical display on a wall of the living room. A wall adjacent to the windows would be great.