Most Pearl condos have a 30 day minimum rental policy. I recently did a bunch of research on this being that many of my clients are looking to rent out. I know that North Park Lofts (8th and Flanders) is rentable by week. My associate and I sold one in there last summer to someone that rents it out weekly.
Try calling the management companies instead - if your client is interested in a certain unit go ahead and call who-ever is managing it and they can tell you the exact rental policy.