Help with a cab

i am looking to buy a grow cab with the intention of growing low ryders. i am brain dead reading about cabs and then reviews of them. looking to grow max 4 at a time. i know i could build my own but prefer not to and i don't have the money for a bc norther lights unit. so that being said, what would you more experienced growers give me in the way of advice on units and dealers who sell them. also i prefer a unit that is pretty turn key.

thanks