<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/2a6ecfde-4db8-49f1-b036-d9e4ccfbc550/face.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/2a6ecfde-4db8-49f1-b036-d9e4ccfbc550/face.png" width="40px" /> Skip the soldering items if you are getting a hotswap PCB.
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Get a soldering iron with a adjustable temperature gauge. You don't have to go for a Hakko, as long as you can get it to between 350 - 390C (degrees centigrade)

Crucial when you need to fix mistakes.

High quality 60/40 or 63/37 leaded solder will do. You can get these from most electronic stores.

Used to pull your keycaps off the switches.

Used to pull your switches off your PCB. You technically can pry the switches off the boards with precision screwdrivers but these are a nice to have.

Used to test your PCB. Actually just handy in working with the smaller pieces in the keyboard.

You can grab these from any dollar store or electronic store.
<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/04f41168-4470-4eaa-a220-a0aae659d905/face.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/04f41168-4470-4eaa-a220-a0aae659d905/face.png" width="40px" /> You are already spending so much for the keyboard. I highly recommend you mod your switches and stabilizers. If you are in Singapore, consider checking out Carousell listings. Its actually a really awesome place to shop for keyboard supplies.
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Image via Gunnarkeebs
Used to open switches. You can open switches with precision screw drivers but imagine having to do it for a 100 switches.

Image via Gunnarkeebs
Films help made switches fit snugly. Some people swear by these, but I have gotten away with not filming my switches. (Heresy)