100% on the Doormat, I went to poundland recently and got 5 for £5. Sliced them up and I've got lots of fields for Western or even the Eastern Front.
Destroyed Bunkers - Bought these for like £3 each,
Complete Bunkers - £5 each
You can make alot of things yourself very cheaply.... here is some of the stuff i made for myself.
My own wire...and defences made from thin wire, paperclips and the dragons teeth were made from FORGEWORLD Sprue off cuts..
I even made little tobruks as Defensive Positions.
I bought 4 little life rafts at a Miniature Show....Then got some Lolly pop sticks....Created my own little Pontoon Infantry Bridge.
The one thing I think you can never have enough of is Hedgerows. Terrain, even relatively open terrain has hedgerows and copses in it. Roads are good shout, but to look good you will need 2-3 metres of it, to make realistic looking infrastructure. Equally HO or
TT Scale Railway pieces (rail being fundamental back then as Roads were quite what they are today!).
Buildings can be relatively light, e.g A Farmhouse, and some outbuildings and a Barn. You can add specific terrain to spice it up when you've maybe got some spare cash.
For example on D-Day / Market Garden a Crashed Glider in a field can break up a large open area, equally I trashed my STuGs from OPEN FIRE and made them look like they were burned out, for battlefield ambient destroyed vehicles.
With terrain I think the Landscape is key, the little embellishments you place heighten the experience but if the forces fit, and the terrain fits, personally I don't mind losing because I love the "Spectacle" especially in Large Games.
I think simple, but lots of it is the way to go. here is some of Clubs Big terrain battles.
One day I aspire to this level, but between the price and the lack of flexibility, I don't think I'll get there.
THE TERRAIN GUY.