You do not need to purchase a PlayStation unit to stream channels with PS Vue. The Amazon Fire TV Stick ($40) works great. I have never tried a Play Station unit but my research indicates that the Fire TV Stick works better. Unless you want to also play games, I would suggest the Fire TV Stick. A key feature of the Fire TV Stick is the skip function to skip through commercials rather than just fast forward through them.
Thanks you very much for the info. I’ll look into it.