The common cooling question

[Thyroyalgeek]

I swear I've posted this thread THREE times already, BUT IT'S NOT SHOWING UP! I will try once more. Let just start with what I'm doing this in, a 72" × 30" closet, with multiple fans, sunblaster led strips, diy tables and shelving, and a fog machine I've almost finished. My goal here is to cool this area anywhere between 10 - 20°, which as alot of you know, is much easier said than done. I've been doing a fair bit of research, and have looked at different means of cooling, with none of them very efficient. What I'm asking is does anyone know if you can cool anything larger than a terrarium without going broke?