Upload & Sell: Off
VGA is technically defined as 640x480 resolution, but at the end you say you want HD, two completely different animals. And as HD, are we talking 720 or full 1080?
You also say over long distances, but you're only talking about 30ft cables?
And then you're talking about splitting the signal on secondary monitor AND projector. So is this a triple display system, with the secondary and tertiary monitor mirrored. Also, are the 2nd monitor AND projector some distance away, or is secondary local and projector is remote?
Finally, you say "on the cheap" and HD in the same post...
I've driven multiple monitors and remote projectors hundreds of feet away with good quality VGA cables and quality splitter (not just vga splitter cable) - but I've not pushed HD over those distances because I haven't used HD projectors.
You're ebay solution will be very poor and susceptible to all kinds of interference. Normal VGA cables are shielded, whereas the CAT6 cable is only twisted.
To push HD signal (sans audio), you'll want a splitter capable of >388Mhz such as this:
And then quality, shielded cables like:
which is Male <-> Female, but if you need Male <-> Male:
So instead of a $15 attempt, a good solution would be only $60.