Stay out of Grandview on the Missouri. Also in Missouri, Hyde Park, Waldo, Brookside and West Plaza are overrated and overpriced. If I had to do it, I'd pick West Plaza or Valentine-Roanoake. But the KCMO schools are totally trashed, so avoid if you can. Independence schools are no better, and worse on the safety and real estate front. Unless you like living in a beautiful older home next door to a bunch of hillbillies, that is.
Overland Park is fine, but stay away from anything north of 75th street, unless the payments are super low or the house is super nice. Olathe is fine. Prairie Village is expensive, but worth it. Roeland Park is OK, but not great. Same with Mission. West Plaza slops over to the Kansas side and it's better on our side than theirs. Remember the schools.
Remind the person that working in KCMO and living on the Kansas side can cost tax money. It's much easier to live and work in the same state, unless you want a hassle from the Kansas State Department of Revenue. And they're in financial trouble, as I'm sure you know, so they will come after you for every penny.