tybeeheart - On the positive side the answer to your question is yes six TVs are doable and two can be wireless.
In the real world, you may not be happy. At the least. you will probably be aware of restrictions.
Four streams come into your house at a time based on live watching and/or recording. So, only four TVs can watch a different channel live.
If you record a lot of shows it adds to the contention. But, once recorded you can play them without impacting the four incoming streams.
It is kind of complicated, so, review your viewing habits & come back with more questions to see if it is workable for you. A high usage situation is most likely going to require coordination & compromises.
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.