This is my home, I want to build up the foundation on side and rear of the house. Whats the cheapest way to do it? Surely i cant use all topsoil. Should I use fill dirt and then last layer of topsoil? I want to build it up to below the crawl space door, but not all the way up to it. Thanks for any help or ideas guys. I would like to maybe put down some stone also, but not completely in stone.