where to go?

If I had a dineing area that was white boxed 40 long by 20, what kind and how much seating could I get (in my area we need 2 bathrooms to incorpate in that area as well.
also who would you call to get remodeling ideas and costs!!!

Most restaurant supply companies have a someone who could draft something up for you. Most of them work with people who do cad drawings, or have someone on staff.