Not all Blue Sea fuse blocks cost $140.
Here's what I used:
http://www.westmarine.com/webapp/wcs...classNum=11287
$55 for ther 12 fuse model, which is plenty. I'm sure you can find it cheaper if you look around. I've had no issues with the 2 I've put in, rewiring 2 seperate boats in the past 2 or 3 years. These are just fuses, not breakers.