He will never have to eat those fucking awful dextro protein bars his omni-tool makes out of miscellaneous plant life ever again.
He very nearly does a happy dance. Only the judgmental gaze of his ancestor spirits stops him.
Once he gets back to Delphira, he finishes Deathly Hallows and thinks about what to do next. He's got money. He's got magic. He no longer has to worry about food or sleep. The only thing he does have to worry about is, well, boredom. He doesn't think he can live forever just hanging around his apartment reading books and hunting another monster every few weeks. He could dedicate himself to wiping monsters off the face of the planet, but that sounds both boring and impossible.
Maybe somebody's going on an adventure and he can tag along. That's worked out for him in the past. He puts out feelers: are there any expeditions going out, looking for new pools or the like?