I ran the recipe through an online brew-app and came up with the numbers I posted earlier.
30' instead my stab at 5' will significantly increase bitterness. My advice here is to use a tool to calculate/predict your brew. Beersmith, BrewersFriend, anything. Simply halving the volume may give you ballpark values, but a proper tool will factor in things like yield, utilisation, and whatnot.
You mentioned earlier you were going to rack onto coffee grounds, but now you say you'll be bottling with cold pressed coffee. Impossible to predict the outcome unless you post a (complete) recipe.
That being said: cold pressed coffee will add (besides coffee flavour) acidity (moreso if you use very acidic coffee) and will significantly lower the perception of body.