When my storage space was just the back of my truck, I spent minutes instead of seconds on unloading. Having a scrap space in my yard makes some difference. I expect big containers will make a bigger difference. Cheap and free containers can be found on craigslist, but they may be listed as trash, garbage, refuse, or storage bins, cans, boxes, barrels, or containers, in household, farm & garden, tools, or general, so searching all of those terms in all of those sections takes some time that I'd rather spend scrapping. If I search for barrel, I always get a few results of "wheel barrel."