I don't know if the world is exactly your oyster when you are a recent grad and realistically you will be confined to the region you attend law school most likely. Even if you had opportunities arise elsewhere you would have to take another state bar and over 3 years of law school you develop many connections in the area you attend law school making it hard to leave. Are there exceptions of course, but I would bet substantial sums of money that if you attend law school in Kansas you will end up living in Kansas
With that said there are numerous things to consider when choosing a law school and please, please, do not use U.S. News Rankings as the primary reason for choosing a law school remember this is nothing more than a for-profit, unregulated magazine, and whatever difference there is between any of these schools does not matter and I have no idea and don't care, which of these schools are better. I know Kansas blew my NCAA tournament pool and I know nothing about the other two schools.
I would recommend you consider the following things when choosing your law school.
1) Location: I realize these are all in the Midwest, but I imagine Lawrence, Kansas is obsessed with College Sports while Topeka, Kansas might be more low Key and UMKC might be a bit more of a bigger city. I no nothing about you, but whatever town you live in will be your home for three years so make sure it is a good fit.
2) Personal Feelings About School: It is also important to realize each school has a vibe to it when I was a 0L some schools I liked others I didn't just my own personal opinions and you might like what I hated and vice versa. I would encourage you to visit the schools, talk to professors, the dean, admins, students, and just see if it is a fit. If any of these schools give you a bad feeling cross them off if you feel good about it listen to your gut.
3) Reality of Legal Education:
Realistically whatever school you attend you learn the same thing your first year is Torts, Contracts, Property, etc and you read Supreme Court Cases and they do not write separate opinions for different law schools.
There is no "right" school and certainly no anonymous interent poster can tell you what is best. It appears you are considering the costs, but really think about what school and city suits you best it will be a life altering decision. Good luck.