Hi mama,
Erm, I did consider cord blood banking but another thing that really made me reconsider it was delayed cord clamping or waiting for white. This is where you wait for the umbilical cord to stop pulsating before cutting.
I felt the benefits far outweighed banking cord blood.
You can watch a video for the rationale behind it here:
https://youtu.be/W3RywNup2CM
Sorry I digressed but I thought I might share this with you :)