Picture & projection
The short answer: I would choose the Elite Screens Yard Master 2 for a movie night on the lawn. Its folding frame travels well and holds the screen taut. For a screen that stays indoors, the Silver Ticket STR-169120 makes more sense.
Sound & speakers
The short answer: The Bose S1 Pro+ is my first pick for small talks and acoustic sets. It is also easy to carry. Choose the Electro-Voice EVERSE 8 if its added output and weather cover better suit the job. Neither replaces a full sound rig for a loud dance floor.
Mics & live sound
The short answer: I would start with the Shure BLX24/SM58 for short speeches and small live sets. The Sennheiser EW-D 835-S is worth a closer look for a busier setup. Buy the right frequency band for your area. Test the whole route before guests arrive.
Parties & photo booths
The short answer: The OrcaVue Air-34 Pro Bundle is my first choice for hosts buying a 360 photo booth for regular use. Its stop feature, clear space needs, and travel kit stand out. For one wedding or birthday, I would price an attended rental before buying.