The Aquafarm costs about $60, depending on what promotions they have running at the time. For that price, I think it's a definite buy if you have any interest in gardening or aquaponics. It's also a great gift for a garden lover.
However, students who attend lower-ranked schools can still take a rigorous curriculum. Wherever you go to school, it's important to take the most advanced courses available and to take advantage of elective credits to strengthen your engineering education.
Although all these classes will help your engineering studies, as a future aeronautical engineer, the Math and Physics classes will be the basic knowledge that you will build upon. If your school does not offer all of these courses, you might be able to take some of these classes at a local college or community college. Your guidance counselor will be able to help you make some of these arrangements. If you do not have an opportunity to take all of these classes, do not be discouraged.