if it's your first ever mod it can be daunting & yep $200 sounds about right for 1/4 hours work LOL (ok maybe half an hour to an Hour as I bet they like to tidy up the illumination & wirings a bit better than I do)
have you bought New, as in did it come with a kit / vac line and a "T" etc?
is the line good quality or can you crush it with your fingers (like my Aliexpress Boostgauge LOL / not lol)
first you need to find a weak spot in the fire wall, a grommet or rubber boot you can push the line though towards the Intake Manifold
now I'm not familiar with anything newer than 98 so yeah bear that in mind here (someone else may pop along shortly with pictures)
"t" into a line going into or out of the intake mani & run that back to where ever your going to mount your gauge, mounting in itself is another wee drama, are you going to make holes in your dash? / steering wheel mount or in front of your cluster? I think Pillar mounts are awesome btw
black wire ground, yellow will be 'acc' blue? Might be illumination ie when you turn your lights on the face lights up, oh and a red for +ve / always on maybe
bit hard to guess without knowing a bit more about what you got, did it come with instructions?
I am a bit of a joker so some info vauge on purpose as I know I'll get corrected by someone here who's done it more than the 2x I have i reality LOL
being a newer car I'd like to think you'd prefer a neat & pro install too, so might just be worth paying for this time