Good morning and welcome to the board,
You will find in the long run that the proper splint could be well worth the money. I know the money hard to come up with when you don't have it. Maybe you could:
(1) pay a third or half of front, then make payments on the balance;
(2) my OMS gave me my first splint cheaper since he knew I was single mom with no money. Maybe if you explain your situation they would be willing to help you out;
(3) maybe you could appeal to your family. Mine is by no means rich, but they would always give what they could, maybe you could piece it together that way.
(4) maybe there is a charity org around you which can help if necessary
Not much is more important than your health. If you don't start to take care of this problem now, it will only get much worse and cost much more. Believe me on this, i'm speaking from experience. I would try to come up with the money for the second opinion first though. You may find it well worth it, there are alot of docs out there who seriously screw people up because they don't really know what they are doing. Please don't be discouraged. You can and will find a way.
Autumn