You're not worried about cost, but your dad is? Do you believe in Santa or do you have independent finances? Sounds like you should be seriously considering a less expensive option.
I built an 8'x8' run out of 2"x3"s, zip ties and 1/4" hardware cloth for about $100. It's predator proof, mobile with 2 people, and designed to be disassembled for when I move out of the area next year.
I'd much more strongly recommend paying $20 for a book (or online set) of coop designs. You can easily build something using scrap wood from pallets (often free from
WalMart or other large distributors), and I've seen people use shipping crates as the basis for coops (as well as brooders). There are options out there and it's NOT worth the $$$ for a pre-built coop... especially when you consider that the savings will buy you MONTHS of feed, litter, etc (in your case MANY years!).
There are a lot more miscellaneous expenses you'll encounter than you currently expect, if you don't yet have chickens. Work with your dad if he's willing to help you build, and enjoy the experience of learning to design and execute building plans. The cost of shipping alone for some of the coops on My Pet Chicken or the like is greater than my entire initial expense.
All that said, I'm pushing toward do-it-yourself because I'm 25 and probably more recently in your age-shoes than most of the people here, and taking advantage of a parent's experience (my mom's, in my case) is a GREAT way to learn about the *real person* your parent(s) is!!! It also builds their positive feelings about the chickens (you'll have them on dad's property, right?) and they'll be more likely to help out if/when you need financial assistance rather than saying "I told you not to buy such an expensive coop, lesson learned, bug off".
You should know the Eglu is TINY. It will hold three chickens at best and if you want to breed your chickens, you will need another coop for when the chicks grow out. Are you in the US or UK? In a lot of places in the US, people list chicken coops on CraigsList. In South Carolina where I am, for example, there are 7 local builders who will design to your specifications.
As a general rule, plan for 4 square feet per chicken in the coop and 10 in the run if they will not be free-ranged. Bigger is always, always better.