Modern home plans don't have to be expensive, but you definitely have to think about your budget so that you can compare it to the designs that are available and the ideas that you already have about the house that you want.
When you are searching for a designer, search for one that is local to the area where you want your home built. Typically, local designers will have a better knowledge of the region, the laws, and the other issues surrounding your new house building project.
Exposed wooden or steel beams, flat roofs with large overhangs, and split levels to take advantage of the terrain, are also common accents associated with the contemporary style.
Given their professional experience in house designing, it can be helpful to hear why certain elements will and will not work as you may envision. Your architect will be able to show you 3D walk through plans too. This can be useful exercise to examine sun patterns at different times of day and get a feel for the scale of your future modern home.