Another cheap alternative to brass sheet and is very versatile is aluminum foil, the thickness of the roasting tin or carryout container from take away restaurants.





Another freebie cast off from all plastic kits is the sprue of various thickness that can be stretched, heat bent, and shaped, sanded and carved. I have also found that the centre of the sprue centre can be drilled through easily to make hollow tube and carved to make universal joints or the like.
Plastic and metal mesh from old electrical appliances, fly screens or other strange sources that are cheap, if not free !!!!!!!
Drill, tweezers and embossing tools

Sanding, carving and scribing tools

Circle cutters, wire handle jigs cutting guides and folding tools

Clamps, pegs, wire cutters, metal set squares, metal rulers, scale rulers

Superglues of various thickness, two part epoxy glues, fillers, etc

Fine and course sanding sticks and paper
Digital measuring calipers and adjustable metal compass with one sharpened end (both useful of scribing plastic sheet with a repeatable required cutting size) and calculator for scaling off and resizing drawings to your own scale, leather hole punch, saws, micro saws, cocktail sticks, metal plate and metal plumb bob (useful to flatten aluminum sheet), pliars, cutting mat

Vertical bench drill, saw miter block (marge and small)

Reasonable quality (not necessarily expensive) mini drill and lathe set (Ha ha ha I need to get around to using mine)

You could make a cheap aluminum foil corrugating tool

Painted measuring sticks and a good quality digital camera with plenty memory cards

Books, scale drawings and reference information off the net (often cheap and more often free if you look or ask on here or other forums)
Hope some of this helps, but there are loads of other useful stuff folks will tell you about. Maybe we soon get to see you take on a subject of your choice very soon.
Nige