Clever way to tag me Mr. Dean... clever.
To answer your questions Dimensions, yes you can achieve great results within that $200-$300 budget.
Just keep in mind that the BMW was designed from the ground up to act and sound the way it is and your Civic... well wasn't... so it may require a bit more work.
In terms of products and quantities, this is what I would suggest.
• 20-40 sq. ft. of Damplifier OR Damplifier Pro
• 4 sheets of Luxury Liner Pro
• 1 can of SS Spray Adhesive
All totaled up, on the low end you're looking at $275, $365 on the higher end.
Apply the Damp/Damp Pro to the doors, floor, cargo area and rear quarter panels. Now please keep in mind while installing that only 25% of the panel needs to be treated with a CLD. For example most doors really only need 1.5 sq. ft. of material and that's it.
Once all of the Damp/Damp Pro is installed, you get to lay the LLP down. Now unlike CLDs where you only need 25% coverage, with MLV (mass loaded vinyl) noise barriers you want to create as seamless as a barrier as possible. So measure and cut the LLP to fit as tight as possible. Duct or foil tape can be used on the seams, but isn't necessary.
The 4 sheets of Luxury Liner Pro (total of 36 sq. ft.) should be enough to treat the cabin of your Civic as well as the trunk for the most part.
As an optional step, you may want to add 2-4 sheets of OverKill CCF (closed cell foam) to install behind trim panels. This will isolate it from the sheet metal and further reduce the chance and even kill those really annoying rattles and squeaks.
Hope that covers it and if you have any more questions or need me to elaborate further, just ask!