Can't load or rebuild iPhoto library
My iPhoto library hasn't been appearing. I've tried going through the 4 repair options (that show when I open with Command+Option) and have tried the rebuild a few times now. Each time I try to rebuild, it stalls at the same place (pic attached). From there, nothing happens and my photos are trapped in the library.I have also tried moving the library to an external hard drive and loading it into iPhoto from there and it simply does nothing. If i open the application again, it goes to the regular "get started" page.
I have a large library of 280GB. I'm not sure how many images are in there.
Can anyone help me restore my library? Should I be using Aperture for a library this size?
MacBook Pro, OS X Mavericks (10.9.2)