Kitchen design

We need someone who has kitchen design software, and expertise using it, to flush out our kitchen drawings. We'd like that person to continue to work with us, updating the design, as the kitchen progresses. We aren't asking anyone to actually design anything, but to implement what we have created on paper, in a kitchen software system. We would prefer a sophisticated software program which will allow us to see the room realistically, rather than in a rudimentary fashion. Feel free to quote by project, as long as you can tell us how many changes that would involve; or by each new design or change in design.