Talk with the instructors. They might be willing to give some kind of a tuition waiver or discount or work exchange for a low-income student who shows dedication.
I want to comment on your ambitions about forging your own tradition built upon multiple methods. Many people begin their training with this kind of ambition. Do I understand correctly that you are just beginning in your martial endeavors? If so, I would like to give you a sense of what is realistic. First, there are many different methods of jujitsu, Brazilian being only one of them and there being a vast range of differences between them. There are also many types of kung fu, also with vast differences between them. There are also many types of aikido that all trace back to Ueshiba, also with different approaches to how they train and the underlying philosophy of their engagement.
While it is possible to gain some simple and effective skills in less than a year, every one of these methods would take at least a couple years of DEDICATED AND FOCUSED training to gain a baseline of understanding and competence, and a few more years to become genuinely skilled, and can become a lifetime endeavor to rise to a high level of proficiency and mastery. I suggest you find what is available in your area, train with the best teacher you can find with whom you also have a good relationship, and stick with that. Build your skills under the guidance of a good teacher.
Over time, as you become more skilled, it may become appropriate for you to train in another system. Or maybe not. Honestly, most people are unable to do so effectively, and very very few people can do so with more than two or three. There are some exceptions. Many people want to believe they are that exception. They are not. So be realistic. Becoming skilled in one method is a lot to ask of anyone. There are only so many hours in the day and so many days in the week. It’s easy to spread yourself so thin that none of your training is getting the attention that it needs for growth.
I caution you about expecting to build your own tradition based on several different methods, none of which you have yet trained. You may find that you cannot find good instructors in these methods. You may find that you dislike these methods and have no interest in training them. You may find that some of these methods do not mix well and actually contradict each other. Instead, find a good school and train. Enjoy the journey and see where it leads you. Put aside pre-conceived notions and expectations. Follow the path that unfolds before you.