I might get shelled for this, but here is my .02:
Being first a barracks Marine who needed a reloading kit I could get out of the barracks in one bag, yet still reload my CO's (and anyone else's) shells accurately. Then I turned into a family man with three kids who needed braces, food, a roof, etc. I ended up with a single stage press and kit to do all my reloading. It wasn't fast, or expensive, or fancy. It works to this day though.
For dies I go Lee. People may nay say them, but I have shot groups down to .1 center to center. My bulk loads are currently shooting 2" in my daughter's Rossi, .75 in my old Mauser .257, and .5-.6 in my AR. I will say that the three die kit is the best for singles, bolts, and levers, but add the Neck die for bolt guns as it is well worth it.
For a scale I use two. The Lee one has proved precise enough for me and cheap enough that I have no fear of throwing it in a bag and taking it to the range. I have an Ebay electronic one just for a second check and for measuring beyond 100gr (my archery requires that).
I use the Lee trimmers too. With a drill it is adequate. But I also have a Hornady piece I picked up at a gunshow. It is nice, but not as fast.
For a measure I again go back to my Lee measure. It throws most of my charges within .1 grain once set if I use the handle consistently. It is mounted to the same board with my trimmer.
The single stage press I use is a simple hand press from Lee. Remember I needed to be portable. With it I go to the range and can fine tune my loads right there. I am usually prepping my brass while watching TV (loading is separate from distractions). With my kids getting into it, I added a second one for them to help with. It made things faster for myself too, and was still cheap.
I use a Lee hand primer, but there are many other brands that will do the job of letting you feel the primer in.
To all this I add a set of calipers, some basic tools (pliers, adjustable wrench, screw drivers), and if possible a tumbler if you intend to pick up brass from the range. I made a ogive based OAL gauge with a drill and scrap aluminum and a piece of each type of brass gets drilled and tapped for measuring my leads. That was probably the biggest precision improvement I made and was next to free.
My soon addition will be the RCBS prep center. I think that will be the best addition to a kit that has been unchanged in about two decades.