What kind of tickets are you wanting? $50 subscription + $100 per GA ticket would put you at $250. Honestly, the Fanclub is a sh*tstorm right now. People are returning their subscriptions. There's a 50% chance you might get the tickets you want. Assuming the process goes smoothly. 1/2 the Fanclub had issues getting into the presale without contacting u2.com / Ticketmaster.
I saw plenty of under $50 seats during the general sale.