Two bit of angle iron drilled and bolted together - attach a rope to it, the other to your vehicle. Put your fence inbetween the angle iron, tighten the bolts - pull the fence taught. Best fence tensioner ever if your on level ground.
Get the back cab wire mesh off an old 4x4, grind it up into strips, fold in half and nail to a telegraph pole - excellent feeder.
Get a pallet, preferably one of the blue quality ones that your not sposed to have but they still leave with you at delivery time (should charge them storage!) knock a few rungs out intermittently - make an excellent creep feeder entrance.
Caravan chassis's make an excellent base for chicken sheds!! and are 'mobile' for any fussy planners.
Old fenceposts are excellent for a number of things like benches, tables, doors.
Get some old beers kegs and cut them in half for water buckets (they never break!!)
Old gas canisters make excellent stoves if the front is cutout - and my brother is particularly good at making BBQs from them when they have been cut sideways (obviously we dont do that ourselves as we find them like that and just paint them up lol)
All scrap seems to have a value on a smallholdering, its no wonder that most of us must have piles of 'useful' stuff around.
Ta
Baz