10x10 Kitchen Set Work in this Kitchen
These, "10 x10' kitchens" you're talking about. Are they the advertising sizes you see in kitchen ads? These have no relevance in a real world price point.
If you want an accurate estimate, do a kitchen plan and have them cost it out. Or bring accurate measurements of the walls and plumbing locations and let them do the plan.
That will be a real world cost.
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."
B. Franklin 1759