Want to build a 2 platform entryway to a house. They will be bounded by the house on one side and the garage on the other. I planned on the pedestal method until I found out that the block I'm using is $13 a pop. With app 80 square feet of platform the block alone for the stairs would be over $1000. So my question is... Is it possible to use cinder block as the fill block? If not, what's the best way to go about it using just modified stone fill behind?