You don't even need to be worried about the wild Himalayas animals because they are rarely found. There is no record of an animal attack on the EBC trek. So feel free and enjoy the trek.
Comparing to the other region trek EBC trek is quite expensive and adventure in comparison to other regions. As the world's highest trekking region and the lack of roadways transportation, some hotels may be expensive but if you choose the local one it costs somehow less.