Hello, I am considering purchasing a backdrop for portrait photography. I mainly shoot families with children. So far I have been doing this in outdoor locations, which is usually preferable for visual interest and natural light. However, sometimes I think it would be useful to have a backdrop for indoor use. I would bring it with me to people's homes, so it would need to be portable. I think it would be most useful in photographing infants because from what I have experienced they are more comfortable indoors and they tend to visually get lost in photos with a lot of other things in the background. Another consideration is my space. I live in an apartment, and drive a compact car so the backdrop would need to fold up. So my question to you, fellow photographers; since I currently only have resources and space for one backdrop, what color & material should I choose? Thanks!