Right now it is costing ~3.21 Hive to create 1 HBD but the proposal is returning ~3.82 Hive to the DAO so it's a net gain of 0.61 Hive per every HBD that is funded.
Also the DAO has a daily budget of 11,284 but only 4200 is funded so we have more than enough room to fund an additional 4.8k. Considering that the proposal is returniing all of the proceeds from the trades (plus "interest") it's a no brainer.