4000 watts in a house you are not living in wont be noticed.if you are there every other day it will appear to neighbors you live there which is good.figure you will need an investment of 3 grand for materials.1000 a month in rent plus 300 or so a month in bills.say over 4 months that is an estimate of 10 grand!!got it ??1 grow 4000 watts expect to have 15 to 20 grand in product.and if you are new to growing more like 10 to 12 grand of product.worth it?????my 2 cents