Question 1 - Are they worth it? It would be nice to see what the toad (is that the proper term?) is doing back there, but Wow!!, the price. Question 2 - Wireless or hard wired? None of the info I have found on-line as told me how the wireless ones are powered. Question 3 - How big a monitor? My usual default setting is "More is Better", but then again Wow!!, the price. Thanks in advance.