Individually tools are expensive. And some (very) expensive tools you would only use once or a few times are not worth buying. Like Park or Pedros and buy a kit. It seems like a lot but $200 - $400 is a good starter kit. Then just fill in with specialty tools or pay to have the work done.
Too many people don't use a torque wrench but with nice bikes you need one.
You will see shop people not use them but they know a lot of the torque by hand.