I happen to be off today, so...
Rule 1 Reloading is about saving $$$ so how much you pay and not buying extra shit is important.
Meaning, you can buy ammo that just makes minor, but you are going to pay 2X+ what you can load for. The break even point of my rig was 20,000 rds.
For action pistol, volume is king. A single stage for the random guy is a good idea but you will not get the volume you need. You will need a progressive for action pistol.
Go blue, buy from Brian Enos. The logic here is you want to get the free shipping and no taxes. Do not buy the Competition Reloading DVD.
I learned on a single stage when I was a kid and have the 550b now. I don't feel I could load faster with a 650 without spending more time in case prep. I currently separate the brass with a very brief visual check, then as I put each case in the 550 I give it a quick look for bulges, splits, other things (like Aguila with a groove or crimped/NATO brass.) I find it easier to handle each piece of brass once instead of having a separate step for sorting. This is why I couldn't use a case feeder without changing process. Take more time to save some time seems like a wash to me.
I assume you will be loading bulk range brass, this involves checking the brass for condition.
You will need a case cleaner/tumbler of some sort, I got a hand me down Lyman and it runs fine. See what some other people are using and how they like it. Try not to spend too much, so find what you want and search around for free shipping and the best price. There is a kit from Frankford Arsenal that looks interesting.
I'd say get the 550B, get the Maintenance kit, you will need the extra primer tubes. Fuck the expensive Dillon flip tray, get the cheap ass Lyman. Strong mount yes, roller handle no, tool kit no (use regular tools).
Get the light, it is worth the money.
You need a good scale, do not get the beam scale. Spend some money here so you don't have to throw 10 charges and take an average.
A cheap digital caliper is needed. A bench with some work space away from kids.
Components- the key here is to stay ahead. Especially when there are shortages caused by threats of bans, stay ahead by quite a bit on your components, you may go months without finding any. This will save on frantic facebook messages looking for primers. Ordering primers and powder online requires a hazmat fee, so I try to go local.
Primers have varying hardness, Federal seems to be the easiest to pop. There is a Cabelas near me so I can order and go pick them up (saving shipping) and they often run a sale. There are occasional shortages, so stock up.
Powder sucks balls here lately, very difficult to find your shit. Lots of frantic facebook messages. I currently use 7625 which has been discontinued, but I still have a year's worth. I will be switching to TiteGroup and already have a year's worth. I have identified about a dozen powders I could use, don't be limited to "pistol" powders, shotgun powders will work as long as you can find reliable load data. Be prepared for butt rape on the price, but you have to pay it. Just remember the fucks who charge $30+/lb when it was $15/lb a few years ago. The price a company pays in charging high prices is a loss in customer loyalty.
For projectiles, you need perspective. You will be flinging mass quantities at short ranges in short periods of time, you don't need Camp Perry Bullseye level accuracy. So while maybe a jacketed bullet or high end lead could be more accurate by fractions of an inch at 50 yards, you have to decide if you are going to get the benefit per dollar spent. I started with Xtreme which is excellent price for plated, plated ended up having no benefit over the Hi Tek coated and was more expensive. I'd use Bayou Bullets except I live in the same state and would have to pay tax and their discounts start at 10000 rds, so I use Black and Blue with free shipping and discounts at 5000 rds. Side by side, they look like the same product.
I forgot to address the chrono. Once you get your shit set, don't monkey with it. This minimizes the need for the chrono. You can probably find someone you can bribe into helping you chrono your shit, then you don't have to worry about buying one.