i come out ahead...doesnt matter if i grow from seeds or buy seedlings(i do both).make my own compost,and buy a little mushroom compost,mix em together and turn the soil(by hand with a shovel).depending on how your billed for water would be the only real expense.
start small.its a skill like anything else.oh yeah tomato cages.but they last a few years...i have had a couple tomato plants bend the shit out of thier cages but if that happens you should be gettin a good yield from those plants.
i fell like the jalepenos i grow are priceless...i let em ripen a bit so they are red and green...so good.i also pickle and can my peppers so i can eat em all year.