price of soil = compost + dirt = free….
or a few bucks for pre made soil….
price of water?
what tools?
use an old milk jug with holes poked in the top for a watering….
a hand trowel is like 50 cent at a thrift shop… and could be substituted with a good stick….
a pot to hold the plant is free… or you could make a gardening box with a couple planks of wood….
…
i’ve grabbed live but sick tomatoes plants from the trash at a gardening store, came with soil and a pot… i just added water and had the best tomatoes of my life….
2/ 8 plants died quickly and i planted herbs in those pots…. made pizza….
cost about $1.00 in tap water total… (tap water should sit in an open container a while before using to neutralize the chlorine).

spent a few minutes watering it every once in a while….

check your math, bruh