Ouch! Almost $2,715 which is very close to the price of a new system $2,800!!
As far as the need for a new logic board or uppercase (keyboard./touchpad) would depend on how much leaked in. You might be able to clean the logic board but any damage in the keyboard. or touchpad will require a new upper case. Getting an uppercase assembly will be difficult.
Some of the items on the list are things you can do! You could replace the Touch Bar its a bit of work but doable. The display while it's not to difficult to swap out, getting a working display will be hard as they are so new. The 2016/17 model displays are not inter-changeable with the 2018 model.
Even still it’s a crapshoot in the end. Having the skills to fix your system, access to the parts (maybe take a good six months to get them) the cost of the parts still might be as high as Apples. And lastly not having use of your system for the duration.
This is where it may make sense to just buy a new system as hard as that is to say. Then when you can afford to replace the parts on your damaged system and resell it to recoup some of the cost or just sell it for parts.