Can I use cinder block as skirting on my manufactures home?

I want to replace the plastic skirt on my manufactured home with cinder blocks one because it is stronger and two because it will last longer. My question is can I set the cinder blocks without concrete foundation since it will only be about 3 feet tall. Should I use a rock bed maybe? And if I do need to lay a... show more I want to replace the plastic skirt on my manufactured home with cinder blocks one because it is stronger and two because it will last longer. My question is can I set the cinder blocks without concrete foundation since it will only be about 3 feet tall. Should I use a rock bed maybe? And if I do need to lay a foundation how thick should it need to be? A future plan to raise the ground level is also on the scope will this be a problem?
Thanks for helping.
H
8 answers 8