Casting does require a time commitment, acquiring lead, tin, wheelweights, etc. You can buy ingots, if you live somewhere where the freight factor isn't too bad, that is still a reasonable alternative to wheelweights.
It also requires some investment in time to learn about it and make the bullets. And then whatever equipt you need/want. There are a few items to spend some money on, moulds, handles, thermometer, a lubesizer and size dies may be a necessity, M-die and expanders make life with cast bullets a lot simpler. You need some means to melt it, some means to make ingots.
you need the right weather on a given day, to get out and cast, if you don't have a sheltered area to work in. No rain, not too much wind, and you need to be comfortable out there doing it.
You can buy cast bullets, most likely still need the M-die and expanders.
Whether the cast bullets you buy, are the proper hardness for what you want to achieve, can be questionable.
Some guns will shoot them right away, some take a bit of fooling around with, and some are just plain obstinate. You need to learn about the various foibles of cast bullet alloys and applications, before buying or casting them.
Taking expensive bullets out of the picture, lower powered loads that help brass life, cuts down shooting expense, in some applications, drastically. You have to evaluate what your time is worth vs how much you are willing to spend on bullets and brass.
Shooting my 450/400NE, at 50.00/box of 50 bullets, most of which are not realy suitable for hunting around here, or 90.00 a box of factory rounds ( which are not always easy to come by) 40-50.00 for 20 brass, is a fair incentive to cast for.
My .218bee, .223, no incentive to cast for it. Bullets are cheap enough, brass lasts long enough and is cheap enough, it isn't worth it. I had a 7x57 I shot nothing but cast in, worked well for me. For my 32-30 and 32-40, they were built to breech seat the bullet, brass lasts forever, as it never gets sized, those two are only about 4-5.00/100 to shoot. I have special loads for my 7-08 for hunting with, no expense factor involved, it was the application diversity I was looking for, a chicken/rabbit/whatever load.
You will need to do a bit of research and evaluation on what it is worth to you, to get into it. If you are a tinkerer, you will enjoy it ( most of the time), if you are not, you can get frustrated by it.