What are some economical ways to get a remote analog video feed?
It used to be possible to get these little modulator units that took NTSC video in, and would put out a signal on channel 3 or 4. Not sure if you can still get those, they were common in early 80's 8-bit micros, back when nobody could afford actual monitors, and would let your computer drive a TV. With the demise of analog broadcasting, they probably aren't manufactured anymore, but you might liberate one from a defunct VHS machine. Curiously, a quick search reveals all manner of consumer productized ones available, which might work for you, too. The things I'm talking about look like so:



Anyway, one of those modulators, an NTSC camera module, and perhaps a bit of amplification (about 72MHz ?) and you'd have your own low power analog TV transmitter. And by low power, I mean RF, not battery draw. You'd probably get plenty of range on 0.1W to 0.5W of RF output. This might not even incur the wrath of the FCC until they get around to re-assigning the former analog TV channels.