My number 1 advice to any potential nursing student is to stay away from the "for profit" colleges like Platt, Breckenridge, etc. They are very bad news. As far as TCC, OU, Rogers state, etc my opinion is that you will get out of nursing school what you put into it. TCC may be the cheapest option I think.
You can PM me for more information if you like. I am a nursing instructor.
On scholarships, google it or check with a counselor at TCC. They should be able to help you. Or look around allnurses. Good luck! I am proud of you for going to school as a single mom.