My kids have a playhouse--our converted shed--but they get more excited when I put our camping tent up on the lawn for them.
Of course, they also have a play kitchen--which lives in our playhouse--but when they choose to cook and set out play food, they generally ignore the kitchen and go straight to our bins of play food and their ceramic mini-dishes, most of which came from Ikea. We love the HABA wooden food--and it can get expensive to buy a lot of that--so you may want to encourage your family to think more about what will go IN the kitchen rather than the kitchen itself. My kids are 8 and 5 and still love their wooden play food, but the wooden kitchen definitely had a shorter lifespan.
Hope that helps!