RF Range Extender

[Brian H]

The extra cost of the V572 maybe lower than the cost of so many individual RR501s and you then would have all sixteen House Codes covered.
I would try the centrally located RR501 first.

[HA Dave]

Instead of multiple RR501's, you might take a look at a WGL V572A all-housecode transceiver (http://www.wgldesigns.com) which has a much better range than the RR501.

The extra cost of the V572 maybe lower than the cost of so many individual RR501s and you then would have all sixteen House Codes covered.
I would try the centrally located RR501 first.

I agree with Charles Sullivan and Brian H. The WGL V572A would be a MUCH better solution (actually from what I've read... they're pretty awesome).