And you really need to enjoy the hobby. (with no smoking or drinking)
If you don't, it's kind of boring and repetitious.
And you must discover whether you like working sitting down or standing up, and plan a bench accordingly.
And you must buy at least one good (up to date) loading manual, though there is a ton of info on line, but it's good to check that info against a good manual.
The only way you save to start from scratch buying everything, is after the first 4-5000 rounds (guessing), then you may be even, and ahead after that.
You might visit your local on-line gun boards or craigslist and find a nice used rig for a decent savings (which are usually going to come with dies, tools, scale, and supplies).
VA board.
https://www.armslist.com/posts/12055007/harrisonburg-reloading-for-sale--hornady-lock-n-load If you ever go to gun shows and see tables selling professionally reloaded ammo you can trust (I have many times with no problems, but just for range fodder), you may be able to trade all your brass to them for a discount against buying their ammo, if it's mostly decent once fired brass. You have to lug it to and around the show.
I may have enough brass to cast a nice liberty bell. It just sits in ammo cans.