Language college can cost a lot of money. It is always an ongoing investment for your education and for your future when you choose to start learning a language. As it will take months even up to a few years to fully understand a language, it is also important to consider that there will be costs involved.
Language colleges also high quality courses for individuals who want to learn a language more seriously. With this high quality comes high costs. It depends on why you are choosing to learn the language. If you are learning the language for personal reasons, you need to weigh this out by the cost. If however you are doing it to build your skills, get a better life for you and your family or to understand the predominate language around you, it may be a wise investment indeed.