Perhaps the most important question you need an answer to is, "Why did it crack?"

If it's a structural problem, from poorly compacted fill settling, $1500 probably won't begin to provide a permanent fix.

If it's an expansion/contraction crack, hard epoxy may not help at all, or it may simply cause the crack to 'move' and re-appear elsewhere.

If it's a shrinkage crack, minor patching may well be sufficient.

Pictures would help . . . use Flickr, Webshots, Picasa, etc to post.