If you touch the "Final Eye" in the catacombs and explore the big area where nothing makes sense, you'll get an opportunity to rent an apartment for 1000. Pay it and keep checking back both in the apartment and where the "realtor" guy is after every 1000-2000 steps or so. First the realtor will tell you a family of dwarves wants to settle in. Talk to all of them, get the payment from the head dwarf. Then after that? Keep on checking back after every 2000 steps or so. Complete some side quests and get your main one progressing; fight some monsters. There'll be a guy in a suit near the dwarves, he's your "Revenue Agent". You'll get THOUSANDS in rent from him. Heh to illustrate, I wanderd around the Fool's Manor and Cat Village aimlessly, then I went to go make a cup of tea and chatted on the phone with a friend for about 45 minutes. I came back and collected 67516G in rent. I wish it was that easy in real life ha! Thought it'd be one heck of a Schedule E to fill out...