I suppose most think they will save money. And likely so.
But Dad and I reloaded for the ability to make sure every step was as accurate as we could possibly make it.
If the powder charge is exact, if the bullet weights are the same, if the primers are all the same batch, the primer holes are correct, and the planets are all in align....
If you do it yourself... you need look no further than the mirror to see
who went wrong.

If everything you do reloading is
consistent and correct, there will be less to open up those shots in the groups.
Accuracy begins at the reloading bench.
If things are not accurate there, they won't be down range either.
I use a one stage press. Because I am focused on one step at a time. And I want that step to be as accurate as I can humanly make it.
48 grains of powder, or 47 grains of powder, is NOT the same as 47.5 grains of powder.
Science and loading data mean little if you do not do the work to find that "perfect" load for your firearm.
I use 3 different presses. One Step old Herter's. A RCBS progressive. And I have a Lee hand press I used for 9mm.
I don't use all 3 regularly, but I could in a pinch.

I'd encourage a single stage to begin with. Get good with it. Get accurate with it. Testing your reloads will naturally bring you back to the bench with renewed experiance.
Once you have your "perfect" round, your search will be over in the experimental mode. And by then, you ought to be a damn good shot from the practice.

I like RCBS equipment. I recommend it. But nothing is worth nothing until you are satisfied with your results.
If money is tight, or the household accountant is a problem, start out with a Lee nutcracker. You can move the dies to whatever next press you decide to buy. And you will never lose the experiences.
But not taking that step into reloading is like saying, I hit the gong and being satisfied with that.
To me, cutting that tiny x out of the bulls eye with 3 well placed shots at 200 yards is accurate.
Doing it time after time takes accuracy at the reloading bench.
Whether is is X, Y, or Z reloading press.
Where you step into the waters is completely up to your budget and family constraints.
There is no "MAGIC" press.
Reloading isn't chopping wood. It is accuracy and consistency. It is patience and perseverance. Being that much more dedicated than "Mr. Box Loads" shooter.
There is your bragging rights. Out shoot them. And because YOU know exactly what the loads you make will do, consistently.
The temperature, wind, and weather will weigh on all the same. But the accuracy at the reloading bench is what will win the match.
Arguing tools is like arguing body parts. It's what you can do with the tools that makes it out there where the bullet meets the mark.
Be the best that you can be.