I'm getting this car jumper/power source that should last me the whole 4 days Schumacher XP2260 1200 Peak Amp Instant Portable Power Source https://www.amazon.com/dp/B004EIAADG/ref=cm_sw_r_awd_vfFfvb0Y0QFHZ https://www.amazon.com/dp/B004EIAADG/ref=cm_sw_r_awd_vfFfvb0Y0QFHZ
And plug my $40 computer speakers that I use for backyard parties all the time. And use very little power Logitech Z313 Speaker System https://www.amazon.com/dp/B002HWRZ2K/ref=cm_sw_r_awd_HhFfvb1N5N127 https://www.amazon.com/dp/B002HWRZ2K/ref=cm_sw_r_awd_HhFfvb1N5N127
My friend used these for a while in his roomhttps://www.amazon.com/Logitech-980-000382-Z313-Speaker-System/dp/B002HWRZ2K/ref=sr_1_4?keywords=speakers+for+pc&qid=1645772343&refinements=p_36%3A1253504011&rnid=386442011&s=electronics&sprefix=speakers%2Caps%2C243&sr=1-4 and they were fine and have a little subwoofer too so thats fun. I have this ill use with my prime go sometimes https://www.amazon.com/BUGANI-Bluetooth-Portable-Speakers-Gatherings/dp/B08D6791WY/ref=sr_1_4?keywords=bugani+bluetooth+speaker&qid=1645772564&s=electronics&sprefix=bugani%2Celectronics%2C169&sr=1-4 and really like it alot it gets pretty loud, has good bass, and the battery lasts forever, plus you get a cool bluetooth speaker you can use for other stuff. You can also charge stuff from the speaker battery which is clutch
If you use a Wii to play Gamecube games, you can use a Wii2HDMI converter to make your Wii output 480p over an HDMI cable (after changing from 480i to 480p in Wii settings). Keep in mind that this isn't true HD (which is anything 720p and above), but it should clear up any muddy glare.
For specific Wii2HDMI converters, I recommend the Sewell Wii2HDMI brand (amazon), which has been tested in an article I will link at the bottom. However, it seems to be out of stock as of right now.
You can search "Wii2HDMI" on Amazon or whatever online store you use to find a similar model. I recommend a model that does not perform upscaling, which means finding one that outputs 480p, not 720p. Let the TV upscale the image instead. However, looking through Amazon's catalog, I don't see very many that output unscaled 480p (some don't even specify a truly 480p output), so getting a 720p/1080p upscaling Wii2HDMI converter is fine.
Also, I would recommend a gaming monitor in order to minimize display lag that can ruin timings. For general-purpose gaming, I recommend either the BenQ RL2455HM or the BenQ RL2455HM. Both are the same, except that one is 24 inches and the other is 27 inches.
If you choose a gaming monitor, I also recommend getting headphones or a stereo speaker system. The speakers in my setup is the Logitech Speaker System Z313
Here's a quote for total costs.
Wii2HDMI + {monitor} + Speakers + HDMI cable
RL2455HM (24 inch) = ~25.00 + ~180.00 + ~40.00 + ~8.00 = $253
RL2755HM (27 inch) = ~25.00 + ~260.00 + ~40.00 + ~8.00 = $333
If you're looking for details on display lag, you can refer to this Smash Bros article and this Smash Bros post. A Sewell Wii2HDMI + RL2455HM has 2 ms more display lag than a CRT TV, which is almost nothing because a 60fps frame is 16 ms per frame.