Well, since my iPhone sold in about 30 mins, I thought I would give you guys a crack at this as well before I put it on craigslist.
When I moved into my condo last year, there was no cable line running to the bedroom. I bought this wireless hdmi sender to go from my living room to my bedroom. It worked great most of the time (would drop out 10% or so), but they when I was getting some other work done I had them run a new cable. It advertises it can send the signal 100ft. Not sure if the range is quite that good, but I am also in a multi unit condo with lots of brick and stone. 50 ft in a standard house is no problem.
Here is an amazon link so you can check it out. its $185 new, looking for $100 shipped.
https://www.amazon.com/IOGEAR-GW3DHDKIT-Wireless-Digital-Channel/dp/B00630WKGI