Re: bench order
The bench I use now is some thirty years old, it was my third effort and I finally got it right. The top is 7 ft. by 2 ft., 42" high so I can use it standing. I have a swiveling "bar" stool with back so I can work seated easily, got it at a yard sale for cheap.
I'm right handed and work the press the press with my right hand. The press is mounted near the right corner (kept about 10" of free space to it's right for "stuff"), leaving lots of clear space to it's left. My powder emasure stand is bolted almost directly behind the press, middle of the bench, but the stand is turned a bit to the left so I can easily have access to it while standing at the press operator location, without moving. My (beam) scale sits on a wide shelf just to the left of the measure, at about nose height so I can read it easy. With that set of positions, I can stand at the press while I size dnd deprime the cases, then reprime them (with a Lee AutoPrime), set the cases in a loading block, then drop and trickle/weigh each charge, if I wish, OR simply drop charges into a filled block, and finish by seating bullets, all without moving a aingle step; GOOD work flow!
I have a sturdy 3 1/2" swiveling machinest vise (from Lowe's tool department) mounted on the left front corner of the bench top. The vise is handy in itself but, by mounting them on wood blocks I can easily clamp my case trimmer, concentricity gage, Dremel tool, etc, in the vise and use them as needed.
A "bookcase" shelf unit sits on the bench top. It's 2"x8" boards, full bench width and almost to the ceiling (anchored to the wall too), with the sturdy shelves to hold a lot of weight. It holds my powder, bullets, primers and loaded round supplies. And a radio too.
You are unlikely to be happy with the tumbler set up in any fixed place. Store it and your media under the bench on a lower shelf and set it on the floor to work. Or set it on a clean 5 gal plastic paint bucket with a lid, and you can also store your spare media in it.
Install a few electrical outlets on your bench so you can get power for the tumbler, battery chargers, etc, easily. A inexpensive multi-outlet "power strip" works good.
You will greatly appreciate having good light on your new bench. I think a dual tube 48" florescent "Shop Light" fixture is a minimum, mine is a four tube fixture and it's NOT too much! Hang the fixture above the front edge of the bench top so it can easily shine straight down on your work.
Install a kitchen type paper towel dispenser on or very near your bench. Keep a quart can of denatured alcohol close by, use the alcohol and towels to clean your hands before handling primers.
A normal type gray metal "office" supply storage cabinet is great for bulk item storeage. I got mine, dented and scuffed a bit, from an office supply salvage outlet for not much, cheaper than I could have built one for anyway. It holds dies (now), cast bullet stuff - molds, lead, dipper, electric pot, wheel weights, bullet lube, metal flux, alloy ingots, lubrasizer, gas checks - plus my case sizing lube, gun cleaning supplies, micrometers, dial calipers, case trimmer, neck turner, loading blocks etc.