If you cannot look at a turn key unit and build your own for the fraction of the price... stay away from hydro it is much less forgiving..but buy the unit i asume you mean a locking cab with lights and an exhaust fan and grow in soil for awhile, before switching over to hydro. they look great but damn i have yet to see a full 6-8' cab with a 400wt light or higher with ventalation and mylar for under 1500$ that is an awful lot of money for assembly.....and if you buy it who is going to maintain it and fix it when it breaks..