Hi, the Compu Cue Basic is a single universe interface, and the Compu Cue is a 2 universe interface, the 2nd output comes from the DMX input side that you plug a "gender bender" (3 pin male to 3 pin male) adapter and then set up in the settings that that output is now universe 1 or two.
But yes you can purchase another Cue basic for an additional one universe, they just will need to both be plugged in together for both universes to work.
In terms of the wireless if you need to send two universes wirelessly, then you will need a 2nd transmitter and set the receivers and the one transmitter to a different channel number/color or whatever you have.
Does this help?
also I am not sure where you are seeing 1,000 dollars for a Cue, but that sounds high. The cue should be advertised as no more than 799, the SDE is 1,199. All prices are Minimum advertised price, if you contact a dealer, you'll certainly pay a lower price than the numbers I posted.
Let me know if you have any other questions.