This is about the cheapest press/kit there is. 130 bucks
https://www.brownells.com/reloading/reloading-kits/breech-lock-challenger-kit-prod54175.aspx
That has a press, scale (redudndant but oh well), a hand primer, trimmer and chamfer tool
Then you would want dies, 50 bucks
https://www.brownells.com/reloading/reloading-dies/rifle-dies/ultimate-rifle-4-die-sets-prod65608.aspx?avs|Manufacturer_1=lee+precision&avs|Cartridge_1=BCC_6xzzx5+Creedmoor
To go withthe quick trim in the press you would want a creed trim die. 11 bucks
https://www.brownells.com/reloading/case-preparation/case-trimming/trimmer-case-holders/quick-trim-dies-prod56331.aspx?avs|Cartridge_1=BCC_6xzzx5+Creedmoor
So the nicest cheap route is about 200 bucks.
If you were to piece it together it would be 70 for the
breech lock press, 20 for the
auto prime and 4 bucks for the
auto prime shell holder, 6 bucks for the
trimmer gauge, 13 for the
trimmer, holder scrapper chamfer, 10 bucks for
sizing lube.
Plus the
die set for 50 makes the total of 173 for the absolute minimum.
Probably want to add on a couple lock rings for 10 bucks for 2 so that you can save the settings on your dies. 5 bucks for a funnel. brings us up to 188.
If you want to size your cases accurately the
hornady comparator body is 13 and 10 bucks for a
sinclair bump guide that would go in the body. Those go on your calipers to measure the fired case shoulder and the sized case shoulder so you can see how much you are actually sizing the cases with the difference between the two.
You can get a
case gauge instead but thats less accurate and less informative.