I wouldn't be surprised if buying every card in this deck (remember, EDH builds need 100 total) ran you over $150. Typically, the better the card, the higher the cost, and these guys are pretty competitive.
However, you have options. Do you plan to play competitively? If not, your local game group and/or friends might let you use proxies, or printed version of cards. Proxies can't be used in official games, and some players might not appreciate their inclusion, but they grant you access to any card for free in casual matches.
There's also the online route to avoid having to buy physical copies. Feel free to check out my review of the UnTap server, a free-to-use browser that lets players (who have some patience) play for no cost at any time.