RCA 2000 lumen projector seems to not get too warm at only 37 watts. movies look good on the wall or roof. when i get a proper screen it’ll probably look closer to 1080p. plays videos from sd or tf card in avi format can be m4v files renamed to avi.
RCA 4k TV’s are pretty good on power consumption around 60 watts
Avera 4k TV’s are really efficient too at 50ish watts.
5.1 logitech make good sound systems even the smaller ones, can setup surround sound for bedroom of livingroom with just the green and yellow wires in a 3.5 mm female jack splitter.a 5.1 channel usb box would work too.
nuance were expensive quality sound systems back in the day. sometimes 5-10 grand for a large tower speaker.