For that particular metagame I'd suggest U/W Fish
http://www.themanadrain.com/index.php?topic=30089.0 Reading the entire thread would take quite awhile so look at the more recent lists.
The only "expensive" cards are Ancestral Recall, Time Walk, Black Lotus, and Mox Pearl and Sapphire. The deck has good game vs Stax, Oath game 1 (and games 2+3 if you run Curfew board), Ichorid isn't an auto-loss but still not great, and very good game vs Dragon.