true ,i spend right at about 400 to make my dirt,,but that doesnt need reamend for 4 to 5 yrs,,compost is about it yearly,,and i make it also,leaves grass clippings and cow shit from a friend that own them,,plus he got 300 acres of damn waste ,tree cutter pay him 30 bucks a truck load to dump there and he goes threw and sells the wood,,for weed,i use same dirt,but i do spend 40 bucks for a gal of botanicare soil blend,,and a 1lb bag of kool bloom hell i couldnt even tell ya how long that shit last,,ive grown 2 years with it and havent even hardly broke the seal,,my main cost is electricity too,,adverage is about 250 to 300 a month