If you and your friend are mechanically inclined do it yourself (there are you tube videos that show you how) the one kicker is that the ball has to be torqued to 400+ footpounds.. (ie big air impact wrench or long cheater bar) and the socket is a tight fit (equalizer sells a turned down socket for 50+$) but some say they have been able to use a short socket or 1 3/4" and get it to work. Good Luck!
On edit: $900 for an installed Equalizer hitch??? OUCH..my 14k (biggest they sell) was $600 delivered (RVW)...talk about padding the labor..