I have recieved numerous scholarships, ranging from about $200 - $15,000. They are waht allowed me to go to a private college.
The 15k one was from the college itself, and since more than 80% or something like that of students at my college received financial aid, I'd say that one wasn't too difficult to obtain.
As for other scholarships, the more you apply to, the mroe chance you have of recieving one. I have a hub that somewhat relates to this.