Nice, have fun with it! A rebuild definitely won't cost you 10k. Good thing your doing it your self. Should only run you a few grand replacing everything. It can be cheaper replacing all the internals or getting a new shortblock and machining the heads. If your short block needs a lot of work then I'd go new oem short block route for sure. Just check to make sure the bore's are still with in spec.
What exactly happened to the motor? Cracked ring? Spun bearing?