@Kimberly Farrally, I am a licensed broker in Kansas and Missouri. What you need to understand is that in most states, there are 2 types of licenses; an agent license and a broker license. In states that only have 1 license, it is a broker license.
In the states that have 2 licenses (Kansas and Missouri each have 2), you must get your agent license first. As a real estate agent, you must work underneath the supervision of a broker. This is mainly to protect the public from inexperienced agents. Each state has its own rules for when and how an agent can become a broker. For example, in Missouri, you have to be a licensed real estate agent for at least 2 years before you can get your broker license. In Kansas, you have to have completed a certain amount of transactions before you can apply for a broker license.
So, the answer to your original question is YES. You do have to be an agent licensed under a broker in both Kansas and Missouri. What you need to do, if you plan on getting your license, is to find a brokerage that specializes in working with investors. Avoid the big brand companies like RE/MAX and KW as they will teach you nothing about investing and their policies will make it much more difficult to do what you want to do as an investor.