Sheesh, $533 seems like an awful lot. My entire grow cost me less than $1000 and that's including drywall and insulation. The most expensive thing I bought was a $2500.00 thermal imaging camera which I promptly returned once the novelty wore off. Of course a lot of my supplies came from things around my house and job which I was able to "borrow" indefinitely
A little ingenuity goes a long way...