So I agree with above. Hard to get those prices down. That said, I have two comments.
1. If you don't want to use 15 types of hops then you will have a different beer and so you might as well look for a different recipe. There are a plethora of them up in the recipe section and depending on your tastes they range all over the board.
2. Might I suggest starting out with something simple for your first IPA so that you can get the basics down and then work your way into something more difficult. If I were you, I would start out with a recipe like this:
90% Base Malt
5% Caramel/Crystal Something or other (20L,60L, 120L, CaraMunich)
5% Flaked Oats (Quaker Quick Oats)
60min addition of a high alpha hop to get you about 60% of your wanted IBU's
20min addition of a Centennial/Chinook/Cascade/Willamette hop to about 15% of your IBU's
5min addition of same hop at 20min to get remainder of IBU's wanted
After two weeks of fermentation, dry hop for a week with an oz of whatever was your main hop
Ferment with US-05, 1056 or 001 for a clean beer.
That said, that is geared towards All Grain, but I am mostly sure that
Edworts House IPA is similar to that and has an extract recipe somewhere in the mix, a couple pages in or so. The idea being though that it is a simple IPA, not too difficult to make and after a few times you will get a good idea of how to make a great beer. And honestly, you can use Centennial for the entire hop schedule in order to make it only one hop.
Good luck and let us know what you want to do.
PS... if you are doing partial mash, try this:
7.5lbs DME
.75lbs Crystal60L steeped
Same hop schedule and yeast