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.
Also characteristic of the ranch style are open floor plans which permit rooms to serve multiple purposes. Ranch style houses frequently include separate family, living, and dining areas which can be converted as needed into entertaining or hobby areas, or into extra bedrooms when required. Although a single level ranch house plan with front porch or patio is the norm, there are also split level ranch houses and raised ranch houses which have more than one level of space.
Look for reputable designers. There are hundreds of different builders out there and every single one has a different history and reputation within the community. If you take the time to check out all of the available designers, you should have no trouble finding the best in the industry.
Many firms offer pre designed plans that can be changed to accommodate individual tastes and preferences. There is a huge range of plans available online and from architectural companies - your task is sorting through all the various elements until you can narrow down a list of crucial components to be incorporated into your plan.