A 4x8 tent with these types of lights would rage around 1000 dollars unless buying stuff used. I don't have inline ventilation and those aren't cheap, so the sky is the limit with this stuff. If you want cheapest price with highest efficiency, I'd go 4x4 tent with a 250 watt panel, could probably get yourself rocking with something decent for around a 500 dollar investment. Can go smaller than that but then efficiency becomes much lower. A proper starting tent in my opinion is a 4x4 minimum size. They make smaller but I'd stay away from smaller for full size cannabis cultivation.