I'm currently saving up the cash at the moment! If you got ahead of yourself and went to Aurora before you were finished doing your bits outside the main quest then you'll be in my boat. Start off small and get a few properties after some lovely lute playing! Then go off and do a couple of quests (presuming you have got a few chests to open still). after a little while, you'll have some more money, so go to your fast track map and buy a couple more properties. Do more quests, then go and buy more properties.
I'm basically just doing this at the moment, its gotten to the point where I nearly own all houses and just saving for the shops etc. Still need more guild seals so I'll just do some quests, kill some wolves then buy some more!