Each college has a range of SAT scores which they consider appropriate. Financial aid is determined by federal policy, and in most cases is awarded strictly on the basis of need.
Some colleges offer merit scholarships to a specific percentage of their top applicants.
It seems logical that the average ACT score for a highly competitive college will be completely different from the range of scores which is acceptable at a less competitive university. In order to learn what colleges will be interested in your ACT or SAT scores, you will have to make a list of colleges which interest you, and then do specific research in college guides to learn what category is in your range.