Really depends on how many channels you intend to watch at one time. With one receiver you can split the signal from the receiver output into, up to, an 8 way splitter to 8 tv's. Only drawback is all tv's would be watching the same channel. If you're going to watch 8 different channels, you will need 8 different receivers. If you only watch 3 different channels, you will need 3 different receivers, etc. Splitters come in different sizes starting at 1x2, 1x3, 1x4, and larger.
Al