Beginning to think I'll need a cherry picker at some point.
Rj45 crimpers and crimps are something I'll always have on hand.
Multimeter for sure
Thermal camera to see if there are any obvious issues before they become bigger.
Various ladder sizes and straps to tie them against something if I...
Depending on how big the load is, could you use one of those portable power stations, they often have a "UPS" mode, double use as a portable power solution for camping, travelling etc outside of the Christmas season, and will run for longer than a standard computer UPS will.
You will find a lot of users here would suggest that you don't go down the Wi-Fi route, as cable is king when it comes to light shows, you won't experience stutter, lag, latency, dropped frames with a cable, however you are likely to with Wi-Fi. If you really must, you could try a raspberry pi...
WiFi is best to be avoided if at all possible when running larger numbers of lights, if you can hardwire to your controllers, you will get a more positive experience. Wifi boosters only boost what they can get their hands on. If they get a bad signal, they'll be boosting that bad signal.
Most floodlights won't do much till it's dark, could try the 30W ones from Ray. I searched for "Flood" on his store page, came up with a lot of results that could work for you...
Has unplugging everything and then plugging back in potentially triggered them to get new IP addresses from the DHCP server (probably your router) assuming nothing was set to static before hand.
For $100 you could be up and running with a couple of hundred leds to deck out a few bushes, letterbox, front fence etc or even your Christmas tree. Seed pixels are insanely cheap (think about 6-8 cents per led) and a controller like mentioned above esp32 etc, if DIY isn't your thing, I would...
I don't want to come across harsh or anything but buying a setup will be 100% more difficult than setting your own up, as you now need to learn what the last owner of that light display had done/used/wired etc. Starting from the beginning learning and adding a little bit at a time will be the...
I bought a motor driver, essentially an H bridge with fancy controls. Hooked to an esp32 running wled, as it can now drive h bridges, I use it to run about 40 sets of string lights from one single power supply. Really cuts down on the multiboards lol