So I just ordered 4 rooms and realized I'll only have 2 TVs there. HAVE AT IT!

Welp, that's over, fastest install I've ever seen! Terrific job, and all is setup and working :)
 
One of the best things in the world to help a customer remember are those stickers that are at the very front of the owners manual. It may look like hell, but I'll put those little babies on the front of the remote controls WITH the channel number Sharpied to it. Even Stevie Wonder can see that.

Autoprogram the TV so that the only channel left is the one that the TV must be left on.