i want to build a wood shed for very little money, i have salvaged wood
from a garage that was needing torn down. Most of the wood is
salvageable, but not all. I am planning to make this shed on a dirt
floor.

However, the area i am going to put it on, is not flat.

i don't think the flatness would matter so much if i was going to put a
floor in it, because i could raise the floor above the ground on one
end.

How should i go about doing this? It will be constructed like a pole
building.