I thought I made it clear that the box is FREE and I pay $5/mo for the service. Maybe not.
You are right, I should have known someone out there could figure a way to patch together a "comparable" system using a fleet of used Tivos, some used car parts, a hairball of cables and splitters, and a flux-capacitor.
I can envision you with 4 remotes attached into a cube, "turret style", changing channels with both hands, or kick it back to just one remote, and have your cousin Jeb with 3 arms cover the IR sensors on the 3 Tivos you don't want to control at that moment. It's cool though, Jeb works for beer.
Not to mention, they have your picture on the wall at Tivo with a caption that notes that you have twice as many Tivo subscriptions as their #2 man who only has 2.
If that's what you have to do to make Tivo feel like a good deal (BTW, what does that cost you a month? $28-$52?) , then go for it.
I'm going to stick with the dual tuner HDTV box (singular) that Comcast gave me for FREE (no cost up front), and live with the $5 a month.
But hey, all is not lost, you are the record holder.