I think it is cost effective to buy a decent organic base soil off the shelf and then amend it after the first run. Just add a source of fertilizer and compost for the first run; possibly some perlite/coco for aeration if that makes it kinda mucky and then fully amend the soil after harvest. Then you can aquire your amendments slowly rather than having to get everything all at once.
Oh sure you can spend a fortune on small bags of “super soil” or source everything needed and make up your own mix but buying the soil and mixing in amendments is cheaper and gets similar results. A 5 lb bag of natures “super” soil is highway robbery at $42 imo and you’ll need a lot more than this if you run multiple plants. The only thing that makes a soil “super” is compost so source some EWC or even better start a worm bin and have free compost for life...make as much super soil as you want. It doesn’t make you a sheep if you just want to water your plants and get on with your life; can’t beat the simplicity of organic soil grows.