The kitchen has white walls and cabinets with berry counter tops.The wall runs into the living room and want to paint a pale grey. How do I transition from the white to the grey?

My husband is a Kitchen Designer/ Appliance salesman. Do you think there would be an intrest in this????

Is it ok just to ask cabinet company people to just come out and give me estimates? How do I know if I am getting an accurate estimate? How many estimates should I request? How much information do I need to give the estimator? I am concerned about "offending" companies ...