Last year I put together a bunch of terrain for Malifaux. My goal was to make it as cheaply as possible but still nice. It also had to have options like walls, objective markers, and elevations while also fitting in one small carboard box.
I started by going around the house where I live and collecting random bits of garbage, wire, and cardboard. This is what I came up with after an afternoon of scrounging.
300 Challenge 40K Army Lists Battle Reports Board Games Brackets Cadians Collecting Creepy Structure Cryx Dead Justice Deathwatch Dread Fleet Dystopian Wars Frontier Game Room Gutshot Hobby Starters Hordes Imperial Guard Khador Kingdom Builder Malifaux Mansion Modeling Movie Orks Painting Rant Reviews Slum Space Marines Swamp Terrain Tournament Victorian Warmachine